A search engine is a web application, designed to search for data on the World Wide Web (www) and FTP (File Transfer Protocol) servers.
Search Engine includes web pages, images,files or videos.

How Search Engine works?

Search Engine will Crawl (search) all the website for the data related to given keyword. Its mainly looks in text only. Now a days Search Engines are upgraded so that it will check your design work, linking from other related website to your site etc..

This task is performed by a web based application called Crawler or Spider(In Google called as Google bot). It will crawl all pages of your website. That's y its better to submit site map to the search engines(Will explain you later).

By submitting your website to major search engine you can increase your search ranking. Because after submitting your site the crawlers will index your site quickly.

 

How to submitting(Add URL) a website to Search Engine?

Major Search Engines are providing you to submit your website. I will tell you some major Search Engine's link for submitting your website.

Google
Click here to submit your website to Google.
Yahoo
Click here to submit your website to Yahoo.
Bing
Click here to submit your website to Bing.

After you submitting your site to search engines it will take time to index your site. It may be one week to one month. So don't keep on submitting you site. It may causes spam in search engine and it will reject or block your website from crawling. Submit your website only one time, and wait. This SEO will not happen in overnight it will take some time.