Downloaded 493 times
Uploaded byHardik Mahant
How Google search works ppt
The presentation outlines how Google Search works, covering the processes of crawling, indexing, processing, and retrieving search results. It explains that Google utilizes algorithms to assess relevancy and filter spam while delivering results rapidly to users. Founded by Larry Page and Sergey Brin in 1996, Google operates on extensive server infrastructure and monetizes through various channels, primarily advertising.
How Google search works ppt
- 1. H O W Google SEARCH WO R K S Presentation by : Hardik B. Mahant
- 2. CONTENTS • Overview aboutGoogle • What actually happens when we Google • How Google search works • Crawling • Indexing • Processing • Calculate relevancy • Fighting spam • Retrieving results • References
- 3. OVERVIEW ABOUT Google •Google was founded by Larry Page and Sergey Brin in 1996. • Located in Mountain View, California. • Google earns money by advertising, by play store & many more ways. • Google is running on thousands of computers which runs on customized version of Linux. • Google has more than 4,50,000 servers (approx.) around the world.
- 4.
- 5.
- 6. Keyword in Title Inside <title> tag Keywordin link Keyword in <h1> Tag or in description
- 7.
- 8. HOW GOOGLE SEARCHWORKS • Crawling • Indexing • Processing • Calculate relevancy • Fighting spam • Retrieving results
- 9. CRAWLING : FINDINGINFORMATION • Process of fetching all the web pages linked to a website. • Performed by software, called crawler OR spider OR googlebot. • The crawl process begins with a list of web addresses from past crawls & sitemaps provided by website owners.
- 10.
- 11. INDEXING : ORGANIZINGINFORMATION • Google uses the INDEX databases; after every search, the result will be stored in this DB. • Process of creating “index” for all the fetched web pages and keeping them into a giant database from where it can later be retrieved. • By this, if the another user searches the same keyword, which had searched before, results for that will be retrieved more faster.
- 12.
- 13. PROCESSING : BYALGORITHMS • We want the answer, not trillions of webpages. • Algorithms are computer programs that look for clues to give you back exactly what you want. • Algorithms are the computer processes and formulas that take your questions and turn them into answers.
- 14. PROCESSING : BYALGORITHMS • For example they have algorithms for reliability & closer results, -Autocomplete -Freshness -Site & page quality -Safe search -Synonyms
- 15. CALCULATING RELEVANCY :BY CONTENT • Relevancy depends on the number of keyword in a website. • For e.g. inside <title>, <h1>,<alt> or any other tag, or inside the description. • More relevant web page link will be displayed first. • Google also calculates relevancy by number of user clicks on particular link for particular search keyword.
- 16. FIGHTING SPAM :FILTERING CONTENT • Google fights with spam 24/7 to keep our result relevant. • Majority of spam removal is automatic. • Google examine other questionable documents by manually. • If they find spam, they take manual ACTION (e.g. BAN). • When they take action, they attempt to notify website owners. • Site owner can fix their sites, & let Google know.
- 17. RETRIEVING RESULTS :TO USERS • This is the last step performed by Google. • All the retrieved results are shown to user. • This is most complicated step, but also the most relevant to users. • The retrieved results are shown as per the relevancy, site quality, & number of matching keyword in results with matching approximately about 200 factors. • Google performs these steps within few seconds.
- 18. REFERENCES • https://www.google.co.in/insidesearch/howsearchworks/index.html • https://www.youtube.com/watch?v=BNHR6IQJGZs •https://en.wikipedia.org/wiki/Google