Crawling
301 vs 302 Redirects Compared: HTTP Methods and SEO
301 and 308 redirects signal permanent moves, while 302 and 307 signal temporary moves. Compare method preservation, link equity, and SEO impact.
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Showing 13–24 of 37 articles
- What a search engine is
Search Engine Architecture: How One Is Actually Built
Learn the system architecture of modern search engines. Explore crawler frontiers, distributed storage, inverted index sharding, and query broker clusters.
- Crawling
XML Sitemaps Explained: Protocol, Setup, and Best Practices
An XML sitemap is a structured file listing canonical URLs to help search engines discover and crawl pages efficiently. Learn formats, limits, and setup.
- AI search
Google AI Overviews: How They Work and Sources Are Chosen
AI Overviews pull from pages Google indexed via query fan-out. Learn how the pipeline works, how citations are chosen, and what click data shows.
- Build a search engine
Build a Simple Web Crawler in Python from Scratch
Write a polite, working web crawler in about a hundred lines of Python. Respect robots.txt, handle status codes, avoid traps, and stay off anyone's block list.
- Ranking
Google's Documented Ranking Systems: The Complete Guide
Google documents active ranking systems and retired mechanisms. Review the full catalog, how systems differ from updates, and what each does.
- Indexing
Get a Page Indexed Faster: Proven Steps and Actual Timing
There is no button that forces indexing. Here is what genuinely speeds it up, what does nothing, and why the timeline varies from hours to never.
- Ranking
BM25 vs TF-IDF: What Changed and Why It Matters
BM25 improves TF-IDF: word frequency saturates and document length is normalized. Learn the full scoring formula and what k1 and b control.
- Ranking
Google E-E-A-T Explained: What It Is and What It Is Not
E-E-A-T is from Google's quality rater guidelines, not an algorithmic score. Learn what it evaluates, what raters do, and how it impacts pages.
- Ranking
PageRank Explained: The Actual Algorithm and Formula
PageRank calculates page authority by modeling a random web surfer navigating hyperlinks. Here is the actual mathematical formula, damping factor, and code.
- The results page
SERP Features: Every Type of Google Search Result Explained
Modern SERPs display over twenty distinct feature types. Discover what triggers each feature, how to qualify for them, and their impact on clicks.
- Ranking
What Is a Search Engine Algorithm? Complete Technical Guide
A search engine algorithm is a mathematical system that scores and ranks indexed documents against user queries. Here is how modern ranking pipelines function.