How search works
How search engines workThe five steps from discovery to rankingComponentsThe parts that make a search engine runCrawlingHow bots find and fetch your pagesIndexingHow a page gets stored so it can be foundCheck if indexedFour ways to confirm a page is on GoogleCrawling and indexing
Web crawlersGooglebot, Bingbot and the new AI botsGooglebotHow Google's crawler reads your siteRobots.txtRules, examples and a free testerXML sitemapCreate one, then submit it to GoogleCanonical tagPick the main version of a pageNoindex tagKeep a page out of search resultsRanking and results
Search engine rankingWhy one page appears above anotherGoogle ranking factorsWhat really matters, grouped simplyPageRankHow links pass value between pagesAlgorithmsTF-IDF, PageRank and modern rankingResults page (SERP)What each block on the page is forAI searchHow AI answers are built from the indexUnderstand
What is a search engineA plain definition with real examplesTypes of search enginesCrawler, meta, vertical, private and AIBrowser vs search engineTwo tools that people often mix upExplore
Best search enginesGoogle, Bing, DuckDuckGo and moreUses of search enginesThe everyday jobs that search handlesHistory of search enginesFrom Archie in 1990 to AI answersSearch Engine Basics is a free guide to how search engines find, store and rank web pages. It is written for beginners, students and site owners who want clear answers without a wall of jargon.
Who runs it
The site is run by Usman Ali, a growth and SEO specialist with 7 years of hands-on experience in search.

I’m Usman Ali, a growth and SEO specialist with 7 years of experience helping websites get found. I write every guide on Search Engine Basics by starting with how real search engines behave, then checking each claim against Google and Bing documentation.
Read Usman’s profile →Why it exists
Most explanations of search either assume you already know the vocabulary or bury the useful part under sales pitches. We wanted a place where anyone could learn how a search engine actually works, one clear step at a time.
That matters to a wide range of people. A student may need the basics for a course, while a small business owner may want to know why a new page is not showing up. Both deserve an answer they can follow without a technical background.
What we cover
The guides follow the same path a page takes through a search engine, then widen out to the engines themselves.
The steps from discovery to ranking, plus the parts that make them possible. A good place to begin is how search engines work.
What a search engine is, the main types, their history and how they differ from a web browser.
What decides the order of results, explained without guesswork. Our ranking guide covers the signals engines rely on.
Every feature you can see on a results page, from snippets to maps, with notes on what each one means.
If you are new to the topic, the search engine basics homepage brings everything together with interactive demos.
Funding
Search Engine Basics is an independent, free resource that anyone can read without signing up. The site currently carries no ads or sponsored content, so nothing on a page has been paid for by a third party.
If that ever changes, any advertising or sponsored material will be clearly labelled, so you can always tell it apart from our own guides.
Get in touch
Questions, corrections and collaboration ideas are all welcome. Write to searchenginebasicstech@gmail.com or visit the contact page to see what to include in your message.
You can also read our editorial policy to see how each guide is researched before it goes live.