1. What Is Search Engine?
Search Engine is a basically a platform from where you can gain information about any single topic with just entering a simple keyword in the search box. The search engines are basically established to fulfill the information need of people on the World Wide Web. Search engine provide results on the basis of your entered keywords and their already set database. They match your keywords with their already presented data and deliver you results accordingly. The result list you observe is known as Search Engine Results Pages.
A search engine has all sort of information from picture to company profile, web pages to PDF files, web directories to databases etc.
Now, you must be thinking how a particular search engine collects the extensive information easily? These search engines also sustain synchronized information by following particular algorithm by web flatterer.
Few common and highly popular search engines are Google, Yahoo, Bing and MSN.
2. How Search Engine Works?
Three things are the crucial part of search engine working process i.e.
Web Crawling (Spider)>>>>>>>>>>Indexing>>>>>>>>>>Searching
A search engine consist huge database of web pages which they recover from the HTML format easily. These pages are recovered by the web crawler which is also popular as a spider – all the browsers follow the same process. Robots.txt is the main application that will help search engine to extract information from huge database conveniently. On the basis of your entered query the entire content matter analyzed properly so that it can be organized in a proper manner for further queries. When a person enters a single word or few keywords, they want effective search result on quick basis. Thus, search engines accumulate all the cache pages along with web pages from where it has been taken.
Once you listed in Google Spider, whenever you make any changes web crawler find it automatically and influence your ranking and listing position as well. To change your ranking and get listing at 1st page mainly depends on your website content quality, titles of page, SEO strategy and various other elements.
After getting a keyword for query results search, engine examines their index and avail listing of best-suited web pages as per the user search criteria and data suitability. Mostly search engines follow Boolean operators that facilitate the searcher to distill and expand the research process. Search engine always try to deliver exact results the term you have entered. Nowadays, search engines giving much importance to immediacy research which permits users to characterize the space between keywords. Besides, concept-based research is also very popular as following the arithmetical investigation on web page comprising the desirable word or expression users looking for.
Now the question arises, web comprises millions of page related to one word or phrase, how they will deliver you the results in a more precise and exact manner? The answer is very simple; most of the search engine follows a process under which they will provide ranking to sites on the basis of their offered information data and relevancy of keywords. To deliver the best results to users search engine follow two basic methodologies i.e. first, show the results arranged by the human in a hierarchy way. Second, results based on Inverted index in which outcome can be shown by evaluating its texts placement.
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