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A SEMINAR PRESENTATION ONGoogle - The Search Engine

Presented ByAvinash Gutte

Under The Guidance ofMrs. Hemangi Kulkarni

Department of Computer Engineering Pimpri-Chinchwad College of Engineering,

Pune

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To Focus on Actual Working of Search Engine-Google.Explaining the components, algorithm, tools of

Google.How a typed query enters the internet, processing for

the best results and displaying the relevant results in various forms like WebPages, images, videos, etc.

This Presentation Highlights :1.About Google2.How Google Works3.A Video Explaining the working4.New Trends in Google5.Conclusion

AGENDA

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Google Inc. is an American multinational corporation that provides Internet-related products and services, including internet search, cloud computing, software and advertising technologies.

Advertising revenues from AdWords generate almost all of the company's profits.

The company was founded by Larry Page and Sergey Brin while both attended Stanford University.

The company offers online productivity software including email, an office suite, and social networking, etc.

Page and Brin originally nicknamed their new search engine "BackRub", because the system checked backlinks to estimate the importance of a site.

GOOGLE

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Google runs on a distributed network of thousands of low-cost computers and can therefore carry out fast parallel processing.

Parallel processing is a method of computation in which many calculations can be performed simultaneously, significantly speeding up data processing.

Google has three distinct parts:1. Googlebot2. Google’s Indexer3. Google’s Query Processor

HOW GOOGLE WORKS ?

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GOOGLE PROCESSING A QUERY

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I. Googlebot

Googlebot is Google’s web crawling robot, which finds and retrieves pages on the web and hands them off to the Google indexer.

It’s easy to imagine Googlebot as a little spider scurrying across the strands of cyberspace.

Googlebot consists of many computers requesting and fetching pages.

Googlebot uses a technique known as deep crawling.Google continuously recrawls popular frequently

changing web pages and Such crawls keep an index current and are known as fresh crawls.

HOW Google WORKS ?(Continued )

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II. Google’s IndexerGooglebot gives the indexer the full text of the

pages it finds. These pages are stored in Google’s index database.

To improve search performance, Google ignores (doesn’t index) common words called stop words (such as the, is, on, or, of, how, why, etc).

The indexer also ignores some punctuation and multiple spaces.

Converting all letters to lowercase, to improve Google’s performance.

HOW GOOGLE WORKS ?(Continued )

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III. Google’s Query ProcessorThe query processor has several parts, including

the user interface (search box), the “engine” that evaluates queries and matches them to relevant documents, and the results formatter.

The Query Processor provides results using:Page RankThe Spelling-correcting systemMost Frequently visited Pages(Quality

Website)Relevant Ads, etc.

HOW GOOGLE WORKS ?(Continued )

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RESULTS PAGE

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SPELLING CORRECTION &SUGGESTIONS

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Google takes a snapshot of each page it examines and caches (stores) that version as a back-up. The cached version is what Google uses to judge if a page is a good match for your query.

Practically every search result includes a Cached link.

Since Google’s servers are typically faster than many web servers, you can often access a page’s cached version faster than the page itself.

The link of similar pages may be useful for finding more consumer resources, or information on Consumer Reports’ competitors.

CACHED PAGES & SIMILAR PAGES

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Google’s approach to ads is similar to its approach to search results: the ads must deliver useful links, or the ads are removed.

1.Ads must be relevant to your search.2.Ads must not intrude, distract, or annoy (no pop-

up).3.Sponsored links are kept separate from search

results.4.At most, three sponsored links appear on

Google’s results.

GOOGLE ADS

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A VIDEO SHOWING HOW GOOGLE WORKS

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Google Glasses(December 2013)Street View(launched in some Countries)Google Nexus, Google Wallet, Google BooksGoogle Panda, Google PenguinGoogle News, Google FiberGoogle Docs(Spreadsheets), Google TranslatorAndroidYouTubeGoogle ScholarBlogspotGoogle Doodle

Trends in Google

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The Moral of this Presentation is to brush up our knowledge about the services, applications provided by Searching Giant Google and to make best use of it.

CONCLUSION

Thank You