More from Search Off the Record
Should you publish your content as a PDF or stick strictly to standard HTML? Does Google treat PDF files differently when it comes to indexing, ranking, and AI search features? In this episode of Search Off the Record, Martin Splitt and John Mueller from the Google Search Relations team demystify how Google Search handles PDF documents. They break down some of Google's internal pipelines, explain why putting an LLMs.txt file inside a PDF is a bad idea, explore common technical traps like rasterized pages and canonicalization issues, and share practical advice on managing PDFs for SEO, AEO (SEO), and user experience. In this episode, you'll learn: Google's PDF converter pipeline: How Google converts binary PDF containers into HTML pages during indexing so the rest of the pipeline can process them normally.
Sitemaps have been a core element of web development and search engine optimization for two decades, yet Search Console warnings like "Couldn't fetch" continue to generate concern among site owners. Are XML sitemaps still necessary with modern search crawlers, or can search engines and AI bots figure out site structure on their own? In this episode of Search off the Record, Google Search Relations team members Martin Splitt and John Mueller break down the history, technical specifications, and some misconceptions surrounding sitemaps, RSS feeds, LLMs.txt, canonicalization signals, and Search Console indexing behaviors. In this episode, you'll learn: The Origins of Sitemaps: How early web crawling challenges led to the sitemap standard and how building a sitemap generator started John Mueller's career at Google.
Is your website's internal search feature secretly acting as an open invitation for crawling lots and lots? In this episode of Search off the Record, Martin Splitt and John Mueller pull back the curtain on how internal search results pages can turn into "infinite crawl spaces" that trap Googlebot, waste your crawl budget, and spike your database load. They break down the critical technical differences between blocking search pages via robots.txt versus noindex tags, and expose the massive security liabilities of leaving these pages indexable. In this episode, you'll learn: The "Infinite Crawl Space" Concept: How Googlebot treats internal search functions as infinite crawl spaces that can generate an endless loop of new URLs.