Search Engines are a collective combination of web servers and software which are used to search information on the world wide web. The World Wide Web is like a universe of Web Pages and to find a particular web page or Web Pages containing particular information is a daunting task. This sophisticated task is performed by the search engines which eases the task of user in finding information. The search engine builds a massive index of web pages collected with the help of search engine robots. With the help of an algorithm, the engines sort the index and finds relevant web pages matching the search query. You would be amazed to hear but it is true that google serves billions of search queries per day.
SEO is a technique which increases the visibility of websites on the search engines. It makes the website crawlable and easily accessible by the search engine bots. It improves the site structure and other elements like the loading time of the site in order to increase the user friendliness as well as search engine friendliness of the website. SEO is both an art as well as science. It generates traffic to a website organically (i.e without opting for ads and paying money to the search engines).
SEO is also a term used to define persons who practice this technique. There are known as Search Engine Optimizers. The field of seo is directly related to search engines. This covers how search engines deliver the search results, how a user finds information with the help of search engines, what does a user types in the query box, how does a search engine crawls the web, indexes and displays the result to the end user etc. The main function of a search engine optimizer is to make a website rank on the first page of Google for some Keywords related to the industry of the website.
Larry Page and Sergey Brin launched Google. Larry page created an algorithm based on a mathematical formula known as “page rank” which ranked websites according to the popularity of back links which linked to them. This ranking of websites based on relevancy and popularity based on page rank started giving excellent search results.
How Search Engine Works?
3) Processing – Indexing & Delivering
Crawlers are search engine owned software that crawl every page on the intend.