Have you ever wondered how search engines (like google) really work? In this post, there is a detailed explanation of how search engine (google, bing, and yahoo) works.
Internet ( world wide web ) is collection of web pages that carries information in multimedia formats ( text,video,audio,graphic,images etc). There are more than one billion websites available on world wide web. Total indexed web contains at least 4.57 billion pages (Saturday, 07 march, 2015).
When you want to know about a particular topic, you go to an internet search engine on your web browser to search for that topic.If you know the exact URL or address, of a website, you can find it by typing URL into the address bar of your web browser, but if you don’t know the exact URL? you can find web pages by using a search engine.
What is a search engine?
search engine: a search engine is kind of website where users can search differents types of websites by entering words or symbols into a search box.search engine has the database of the lots of websites .it gives results to the user based on query or keywords or characters specified by the user, used especially for finding particular websites on the world wide web.
Query or Keyword: a query or keyword is the combination of words, numbers, or symbols that are being typed in the search box of a search engine.
Internet search engines are special programs on the web that help people to find relevant information based on the keywords.
Search Engine Performs these tasks
- Crawling
- Indexing
- Search
What is Search Engine crawling?
Each Search Engine uses software known as “web crawlers or spiders or bots” to discover publicly available web pages. Web crawlers read web pages and follow links in the sitemaps provided by website owners. Crawlers visit the each page on websites and bring data about those web pages back to Search Engines’s servers. Crawlers pay special attention to new websites, changes to existing websites and dead links.The name of Google’s web crawler is Googlebot which is a well-known crawler.
What is search engine Indexing?
Search engine spiders, also called search engine crawlers get its information from other websites and keep it up to date. Crawler gathers the information on the web pages during the crawl process and then store data in search engine’s database for use. This process is called Search engine indexing. Index includes information about words and their locations. When you search, Search Engine algorithms look up your search terms in the index to find the appropriate pages.It is the search engine index that provides the results for search queries and pages that are stored in the search engine index that appear on the search engine result page ( SERP ). Search engine index is the place where all the data the search engine has collected is stored.
How search works in Search Engine?
People type keywords in search engine to find information on a topic, a search engine scans its indexed web pages in the database for relevant content related to your search.For a typical query, there are thousands of website with helpful information.Search engines sort results by using algorithms to show you the most useful results.
