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Search Engine

Search Engine

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Search Engine

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Presentation Transcript

  1. Search Engine

  2. Search Engine Definition • Search engines are programs that search documents for specified keywords and returns a list of the documents where the keywords were found. • A search engine is really a general class of programs • “Search engine” is the popular term for an Information Retrieval (IR) system.

  3. Working of Search Engine • Web Crawling • Indexing • Searching

  4. Web Crawling • Web search engines work by sending out a spider to fetch as many documents as possible • Spider:  an automated Web browser which follows every link on the site

  5. Indexing •  Data about web pages are stored in an index database for use in later queries •  Index is to allow information to be found as quickly as possible.

  6. Search Engine Modules • Document Processor • Query Processor • Search & Matching Function • Ranking Capability • Summarizing & Presenting Documents

  7. Meta Search Engine

  8. Features of Meta Search Engine • A meta search engine (also known as a multi-threaded engine) is a search tool that sends your query simultaneously to several search engines (SEs), Web directories (WDs) and sometimes to the so-called Invisible (Deep) Web, a collection of online information not indexed by traditional search engines. • A search engine that queries other search engines and then combines the results that are received from all. • After collecting the results, the meta search engine (MSE) will remove the duplicate links and, according to its algorithm, combine/rank the results into a single merged list.

  9. Search Engine Optimization

  10. Features of SEO • Search engine optimization (SEO) is the process of improving the visibility of a website or a webpage in a search engine’s "natural" or un-paid search result. • SEO is a technique which helps search engines find and rank your site higher than the millions of other sites in response to a search query • SEO is the activity of optimizing Web pages or whole sites in order to make them more search engine friendly, thus getting higher positions in search results.

  11. Types of SEO • On Page SEO:This includes providing good content, good keywords selection. putting keywords on correct places, giving appropriate title to every page etc • Off Page SEO:This includes link building, increasing link popularity by submitting in open directories, search engines, link exchange etc