What is a Search Engine?

A search engine is really a general class of programs, however, the term is often used to specifically describe systems like Google, Bing and Yahoo! Search that enable users to search for documents on the World Wide Web.
 
web search engine is a software system that is designed to search for information on the World Wide Web. The search results are generally presented in a line of results often referred to as search engine results pages (SERPs). The information may be a mix of web pages, images, and other types of files. Some search engines also mine data available in databases or open directories. Unlike web directories, which are maintained only by human editors, search engines also maintain real-time information by running an algorithm on a web crawler.
 
Search engine optimization for promoting your website on the internet. This is the process of structuring a web page so that it is found, read, and indexed by search engines in the most effective manner possible. Search Engine Optimization uses on page and off page technique for web site ranking. On page is process of effort that we take in defining keyword, Meta tags, content duplication, domain, title etc which have to follow while developing site. Off page techniques are article submission, directory submission, social bookmarking, forum posting, blog post and social media optimize. You can get there more backlink and good traffic, that increase your website.
 
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, however, the term is often used to specifically describe systems like Google, Bing and Yahoo! Search that enable users to search for documents on the World Wide Web.
 
a program that searches for and identifies items in a database that correspond to keywords or characters specified by the user, used especially for finding particular sites on the World Wide Web.
 
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