{"id":1392,"date":"2026-07-03T13:30:10","date_gmt":"2026-07-03T08:00:10","guid":{"rendered":"https:\/\/nationalmarketingprojects.com\/blog\/?p=1392"},"modified":"2026-07-03T13:31:50","modified_gmt":"2026-07-03T08:01:50","slug":"google-bert-vs-mum-vs-ai-overviews-evolution-ai-google-search","status":"publish","type":"post","link":"https:\/\/nationalmarketingprojects.com\/blog\/google-bert-vs-mum-vs-ai-overviews-evolution-ai-google-search\/","title":{"rendered":"Google BERT vs MUM vs AI Overviews: The Evolution of AI in Google Search"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">The last few years have seen changes in Google Search not experienced in the past decade. From a simplistic keyword matching machine, it is now a technology that understands context, intent, and entire conversation. Any business putting efforts in achieving digital visibility cannot afford ignorance of the evolution, since it forms the basics of an effective SEO strategy.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">We at <\/span><b>National Marketing Projects<\/b><span style=\"font-weight: 400;\"> devote most of our time monitoring the effect of such algorithmic update on clients&#8217; ranking positions. This blog highlights <\/span><b>Google BERT vs MUM vs AI Overviews<\/b><span style=\"font-weight: 400;\"> and its impact on online visibility of your business.<\/span><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_65 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/nationalmarketingprojects.com\/blog\/google-bert-vs-mum-vs-ai-overviews-evolution-ai-google-search\/#Why_This_Comparison_Matters\" title=\"Why This Comparison Matters\">Why This Comparison Matters<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/nationalmarketingprojects.com\/blog\/google-bert-vs-mum-vs-ai-overviews-evolution-ai-google-search\/#What_Was_Google_BERT\" title=\"What Was Google BERT?\">What Was Google BERT?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/nationalmarketingprojects.com\/blog\/google-bert-vs-mum-vs-ai-overviews-evolution-ai-google-search\/#What_Is_Google_MUM\" title=\"What Is Google MUM?\">What Is Google MUM?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/nationalmarketingprojects.com\/blog\/google-bert-vs-mum-vs-ai-overviews-evolution-ai-google-search\/#What_Are_AI_Overviews\" title=\"What Are AI Overviews?\">What Are AI Overviews?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/nationalmarketingprojects.com\/blog\/google-bert-vs-mum-vs-ai-overviews-evolution-ai-google-search\/#BERT_vs_MUM_vs_AI_Overviews_The_Core_Difference\" title=\"BERT vs MUM vs AI Overviews: The Core Difference\">BERT vs MUM vs AI Overviews: The Core Difference<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/nationalmarketingprojects.com\/blog\/google-bert-vs-mum-vs-ai-overviews-evolution-ai-google-search\/#What_This_Means_for_Businesses\" title=\"What This Means for Businesses\">What This Means for Businesses<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/nationalmarketingprojects.com\/blog\/google-bert-vs-mum-vs-ai-overviews-evolution-ai-google-search\/#Final_Thoughts\" title=\"Final Thoughts\">Final Thoughts<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/nationalmarketingprojects.com\/blog\/google-bert-vs-mum-vs-ai-overviews-evolution-ai-google-search\/#Frequently_Asked_Questions\" title=\"Frequently Asked Questions\">Frequently Asked Questions<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Why_This_Comparison_Matters\"><\/span><b>Why This Comparison Matters<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Every few years, Google introduces a model that redefines how search results are generated. BERT, MUM, and now AI Overviews aren&#8217;t just technical upgrades \u2014 each one changed what &#8220;ranking well&#8221; actually means. If your content strategy is still built around 2019-style keyword stuffing, it&#8217;s working against you, not for you.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_Was_Google_BERT\"><\/span><b>What Was Google BERT?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">BERT (Bidirectional Encoder Representations from Transformers) came out in 2019. Before BERT, Google Search would understand each word that was typed in a search query but it could not understand how words such as &#8220;for&#8221; or &#8220;to&#8221; would relate to any other word. It helped evolve the process by making the algorithm understand the sentence in both directions simultaneously and helping Google understand the meaning of the query.<\/span><\/p>\n<p><b>Key impacts of BERT:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Better understanding of natural, conversational search queries<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Improved handling of prepositions and connecting words that change meaning<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">More relevant results for long-tail, question-based searches<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Reduced reliance on exact-match keyword phrases<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">For businesses, BERT was the first real signal that writing for humans, not algorithms, was becoming the smarter long-term play.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_Is_Google_MUM\"><\/span><b>What Is Google MUM?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">MUM (Multi Task Unified Model) was launched in 2021, evolving things to another level. MUM, according to Google, is 1,000 times more powerful than BERT and can understand and generate language in 75 different languages and process text, images, and even videos.<\/span><\/p>\n<p><b>Key impacts of MUM:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Ability to answer complex, multi-part questions in a single search<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Cross-language understanding, pulling relevant information regardless of the language it was published in<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Multimodal capability, connecting text and visual content<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Deeper contextual reasoning for research-style queries<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">MUM didn&#8217;t just improve matching \u2014 it moved Google closer to answering entire problems rather than single questions.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_Are_AI_Overviews\"><\/span><b>What Are AI Overviews?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">AI Overviews are the most visible evolution of this journey. Instead of just ranking ten blue links, Google now generates a synthesized answer directly on the results page, pulling from multiple sources at once. As of mid-2026, AI Overviews appear in roughly 25.8% of all U.S. searches and about 50% of informational queries, and Google has continued layering new capabilities on top of them.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Recent updates have pushed this further. Inline citations have been added to Google which now appear alongside the text they cite. Another addition has been the &#8220;Expert Advice&#8221; box which helps Google gather first-person perspectives from forums, social media and review sites. Google has also started to merge AI Overview and AI Mode into a single AI Search experience where users can jump straight from the search results to a conversational follow-up.<\/span><\/p>\n<p><b>Key impacts of AI Overviews:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Users often get answers without clicking through to a website<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Organic click-through rate on pages that trigger an AI Overview has dropped by as much as 61%<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Being &#8220;cited&#8221; inside the AI-generated answer matters as much as ranking position<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Structured, well-organized, first-hand content is more likely to be pulled into these summaries<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">This is why many marketers now talk about Answer Engine Optimization (AEO) alongside traditional SEO \u2014 a practice that focuses on getting a page selected, quoted, and cited inside the AI-generated answer itself, emphasizing clean answer paragraphs, structured data, named authorship, and subtopic depth.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"BERT_vs_MUM_vs_AI_Overviews_The_Core_Difference\"><\/span><b>BERT vs MUM vs AI Overviews: The Core Difference<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<table>\n<tbody>\n<tr>\n<td><b>Model<\/b><\/td>\n<td><b>Focus<\/b><\/td>\n<td><b>Business Impact<\/b><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">BERT<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Understanding query intent<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Content needs to answer real questions naturally<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">MUM<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Multi-step, multimodal reasoning<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Content needs depth, structure, and topical authority<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">AI Overviews<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Direct, synthesized answers<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Content needs to be citation-worthy, not just rank-worthy<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><span class=\"ez-toc-section\" id=\"What_This_Means_for_Businesses\"><\/span><b>What This Means for Businesses<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">For a developing brand and a local company, the change implies the need to rebuild visibility approaches based on trust and transparency rather than on keyword density. Several tips which always help:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Write clear, direct answers near the top of a page before adding supporting detail<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Use structured headings that mirror real user questions<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Add author credibility and first-hand experience wherever possible<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Keep technical SEO \u2014 site speed, indexability, schema markup \u2014 solid, since AI systems still depend on crawlable, well-structured pages<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">This is exactly where working with the right agency partner makes a measurable difference. If you&#8217;re looking for a reliable <\/span><a href=\"https:\/\/nationalmarketingprojects.com\/seo-services.php\"><b>SEO Company in Dwarka<\/b><\/a><span style=\"font-weight: 400;\">, <\/span><b>National Marketing Projects<\/b><span style=\"font-weight: 400;\"> builds strategies designed around how Google actually reads and ranks content today, not five years ago. Alongside SEO, a strong <\/span><a href=\"https:\/\/nationalmarketingprojects.com\/link-building-services.php\"><b>Link Building Service in Dwarka<\/b><\/a><span style=\"font-weight: 400;\"> helps establish the authority signals that both traditional rankings and AI-generated answers rely on.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">It is worth noting that today search visibility includes not only organic search. More and more companies combine SEO optimization with paid search in order to remain visible while building content authority. Cooperation with an experienced <\/span><a href=\"https:\/\/nationalmarketingprojects.com\/ppc-services.php\"><b>Google Ads Agency in Delhi<\/b><\/a> <span style=\"font-weight: 400;\">will provide visibility through both organic and paid channels and ensure that the paid campaign strategy supports organic growth rather than competes with it.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Final_Thoughts\"><\/span><b>Final Thoughts<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Transition from BERT to MUM to AI Overviews reveals the obvious trend: Google is moving beyond matching keywords to understanding and answering intents. Those companies that will adjust their content and strategy in line with this trend will remain visible, while those who fail to do so will lose their traffic despite the fact that they remain in top positions. Being aware of such changes and cooperating with a team which monitors them will be one of the most valuable decisions for any business in 2026 and further.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions\"><\/span><b>Frequently Asked Questions<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ol>\n<li><b> What is the main difference between BERT and MUM?<\/b><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">BERT focuses on understanding the intent behind a single search query, while MUM handles complex, multi-part questions across languages and formats like text and images.<\/span><\/p>\n<ol start=\"2\">\n<li><b> Are AI Overviews replacing traditional search results?<\/b><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">Not entirely \u2014 AI Overviews sit above traditional results and summarize information, but the ten blue links still appear below for users who want more sources.<\/span><\/p>\n<ol start=\"3\">\n<li><b> Do AI Overviews reduce website traffic?<\/b><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">Yes, in many cases. Organic click-through rates on pages that trigger an AI Overview have dropped significantly, since users often get their answer without clicking further.<\/span><\/p>\n<ol start=\"4\">\n<li><b> Is SEO still relevant with AI Overviews in place?<\/b><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">Yes. Google has confirmed that strong SEO fundamentals remain the foundation for visibility in both traditional rankings and AI-generated answers.<\/span><\/p>\n<ol start=\"5\">\n<li><b> What is Answer Engine Optimization (AEO)?<\/b><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">AEO is the practice of structuring content so it gets selected and quoted inside AI-generated answers, using clear answers, FAQs, and credible authorship.<\/span><\/p>\n<ol start=\"6\">\n<li><b> How did BERT change keyword strategy?<\/b><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">BERT reduced the value of exact-match keyword stuffing and rewarded content that naturally answers real, conversational search questions.<\/span><\/p>\n<ol start=\"7\">\n<li><b> What made MUM more powerful than BERT?<\/b><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">MUM could process multiple languages and content formats together, allowing it to answer layered questions that BERT could not handle in a single search.<\/span><\/p>\n<ol start=\"8\">\n<li><b> What is the &#8220;Expert Advice&#8221; block in AI Overviews?<\/b><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">It&#8217;s a section within AI Overviews that surfaces first-hand experiences from forums, reviews, and social platforms alongside the main AI-generated summary.<\/span><\/p>\n<ol start=\"9\">\n<li><b> How can a business improve its chances of being cited in AI Overviews?<\/b><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">By publishing clear, well-structured answers, using proper schema markup, and including genuine first-hand expertise on the topic.<\/span><\/p>\n<ol start=\"10\">\n<li><b> Should businesses combine SEO with Google Ads in this new search landscape?<\/b><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">Yes, pairing organic SEO with paid search helps maintain visibility while long-term content authority builds, especially as AI Overviews reduce some organic clicks.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The last few years have seen changes in Google Search not experienced in the past decade. From a simplistic keyword matching machine, it is now a technology that understands context, <\/p>\n","protected":false},"author":1,"featured_media":1393,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"_links":{"self":[{"href":"https:\/\/nationalmarketingprojects.com\/blog\/wp-json\/wp\/v2\/posts\/1392"}],"collection":[{"href":"https:\/\/nationalmarketingprojects.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nationalmarketingprojects.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nationalmarketingprojects.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nationalmarketingprojects.com\/blog\/wp-json\/wp\/v2\/comments?post=1392"}],"version-history":[{"count":1,"href":"https:\/\/nationalmarketingprojects.com\/blog\/wp-json\/wp\/v2\/posts\/1392\/revisions"}],"predecessor-version":[{"id":1394,"href":"https:\/\/nationalmarketingprojects.com\/blog\/wp-json\/wp\/v2\/posts\/1392\/revisions\/1394"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nationalmarketingprojects.com\/blog\/wp-json\/wp\/v2\/media\/1393"}],"wp:attachment":[{"href":"https:\/\/nationalmarketingprojects.com\/blog\/wp-json\/wp\/v2\/media?parent=1392"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nationalmarketingprojects.com\/blog\/wp-json\/wp\/v2\/categories?post=1392"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}