March Core Update Rolls Out; Googlebot Crawl Limits Explained

Google is currently rolling out its March 2026 core algorithm update. John Mueller explained why core updates take weeks to fully roll out - different components need to be pushed individually during rollout stages, with each component requiring separate deployment. This provides rare insight into Google's technical update process, contradicting assumptions that updates deploy all at once and then get refined. The staged rollout approach allows Google to monitor impact and adjust components as needed throughout the deployment period.

Gary Illyes published unprecedented technical details about Googlebot's crawling architecture in a new blog post accompanying Search Off the Record podcast episode 105. The documentation reveals that Googlebot operates as one client of Google's centralized crawling platform, with specific byte-level processing limits. Google confirmed that pages are getting larger and the 15MB crawl limit still matters for SEO performance. The team also discussed whether structured data contributes to page bloat, confirming that page weight remains a significant factor in Google's crawling decisions. Additionally, Google announced a new location for crawler IP range files, affecting SEOs who monitor Googlebot traffic in server logs.

Kevin Indig's comprehensive research analyzing 1.2 million ChatGPT responses reveals that 95% of ChatGPT's citation surface exists outside standard keyword tracking. This third part of his AI research series challenges common AI SEO writing advice by providing data-driven insights about what content elements get cited most frequently. The research builds on previous analysis of 98,000 citation rows to understand which pages make it into AI reading pools, offering concrete evidence about what content characteristics AI systems actually reward when generating citations.

Analysis shows AI content quality remains a major challenge as demonstrated by Grokipedia's continued decline in search visibility, becoming another example of the 'Mt. AI' pattern where AI-heavy sites initially surge then drop heavily as Google's detection systems improve. Moz's analysis emphasizes the need for better quality control when scaling AI content production. Meanwhile, AI led all cited reasons for U.S. job cuts in March at 25% according to Challenger, Gray & Christmas, highlighting the broader workforce impact of AI adoption beyond just content creation.

Aleyda Solis outlined 10 key characteristics that help brands consistently appear in AI search results, combining documented platform requirements like crawlability and structured data with strategic insights about retrieval systems. Her assessment checklist provides practical guidance for brands looking to improve AI search visibility. Additionally, analysis suggests moving beyond llms.txt toward structured APIs and entity graphs to earn accurate AI citations, with brands needing more sophisticated approaches than simple text files to succeed in AI-driven search environments.

Google Search Console's performance report appears to have a tracking bug causing impression spikes when certain filters are applied. The issue affects data analysis and reporting accuracy for SEOs, with users reporting massive impression increases that appear to be false positives. This highlights the ongoing challenges with Search Console data reliability that can significantly impact SEO decision-making and client reporting.

John Mueller addressed whether splitting sitemaps into multiple files is worth the extra effort, providing official Google guidance on a common technical SEO question. While the specific recommendations weren't detailed in the coverage, this represents Google's continued effort to clarify best practices around sitemap management for large websites where file size and organization become important considerations.

OpenAI launched location sharing functionality for ChatGPT to provide more localized 'near me' type results, representing AI search tools moving toward location-aware capabilities that compete with traditional local search. Simultaneously, OpenAI expanded ChatGPT Ads with self-serve access, raising questions about whether it represents a genuine new acquisition channel or just another platform tax for marketers. The advertising expansion comes as ChatGPT continues gaining users and potentially capturing search intent that would traditionally go to Google.

Analysis suggests agentic AI shopping may feel unnatural to users and therefore won't significantly threaten traditional SEO. The perspective challenges assumptions about AI's disruptive impact on e-commerce search behavior, suggesting that human preference for control in purchasing decisions may limit AI agent adoption. This contrasts with concerns about AI completely replacing traditional search patterns, indicating that user psychology may preserve some traditional search behaviors despite technological capabilities.

Google's 'Ask Maps' AI-powered conversational query feature is now fully available to everyone in the US and India after its initial rollout earlier this month. This feature allows users to ask natural language questions within Google Maps, representing Google's push to integrate AI capabilities across its product suite and maintain relevance in the evolving search landscape.

Google Business Profiles may now verify business details through automated calls, texts, or WhatsApp messages to verified phone numbers, according to emails sent to business owners. This represents an expansion of verification methods beyond traditional postcard verification, potentially streamlining the local SEO verification process while maintaining security measures to prevent fraudulent listings.

Microsoft is testing nearly transparent 'sponsored' labels in Bing search results that are extremely difficult to see, continuing Bing's pattern of testing less visible ad labeling. The labels are described as 'super grayed out and super hard to see,' raising concerns about advertising transparency and user ability to distinguish between organic and paid results. This follows previous controversial transparency tests from Microsoft.

Bill Hunt identifies a critical accountability gap in enterprise SEO where performance suffers when authority doesn't align with responsibility across content, technology, and governance teams. The analysis reveals that successful enterprise SEO requires clear ownership structures where teams have both the authority to make decisions and accountability for results. This organizational challenge explains why many large companies struggle with SEO performance despite having resources.

Analysis suggests CMOs should adapt strategy when organic traffic declines by focusing on answer engines that drive higher-intent conversions rather than traditional traffic metrics. The strategic shift involves rethinking measurement approaches and organizational structure to account for changing search behaviors and the rise of AI-powered search interfaces that may deliver value without generating traditional website visits.

WordPress has delayed the release of version 7.0 due to stability concerns with the real-time collaboration feature, with the focus shifting to achieving 'extreme stability' before launch. This delay affects website owners and developers planning upgrades and implementing new functionality.

Matt Mullenweg responded strongly to Cloudflare's claims that EmDash is a WordPress successor, invoking Will Smith's Oscar slap in his response and telling Cloudflare to 'keep WordPress out of your mouth.' Analysis suggests Cloudflare's EmDash cannot currently compete with WordPress due to six specific limitations, despite being positioned as the future of content management systems. This conflict highlights the competitive dynamics in the CMS space as cloud providers challenge traditional platforms.

John Mueller personally responded to a Reddit post from a teenager trying to save his family's Spanish vacation rental business through SEO after previous SEO consultants failed them. The family's business has significantly declined due to lost Google traffic, highlighting the real-world impact of SEO challenges on small businesses. Mueller's engagement demonstrates Google's community outreach efforts and willingness to help struggling businesses navigate search optimization.

Google announced Search Central Live Shanghai 2026 for May 15, focusing on optimizing sites that target users outside of China. This event represents Google's continued engagement with the international SEO community through regional events, providing localized guidance for businesses serving global audiences from different geographical bases.