How Search Engine works ?

There are two major functions of search engine - crawling & an index, and giving answers by abstract relevancy & serve results through user demand . how link structure bind all pages together ? Search Engine crewlers and robots collect information from website and make indexing in database when user enter search quary in search engine its robots providing relevant in SERP. Onces search engine crawls these pages submit code from them and save selected pieces in massive hard disk and stored as billions pages that would be acceded in a second .Search engine has every county has unique search engine for example google.com is world wide searc engine and google.co.in is only india bases search engine. Internet is a huge collection of computer are connected to each other through networking ,

How made inraction between search engine and human ?
Webmaster make interraction between user and search engine We like to say \"Build for users, not search engines.\" When users have a bad experience at your site, when they can\'t accomplish a task or find what they were looking for, this often correlates with poor search engine performance. On the other hand, when users are happy with your website, a positive experience is created, both with the search engine and the site providing the information or result. What are users looking for? There are three types of search queries users generally perform: \"Do\" Transactional Queries - Action queries such as buy a plane ticket or listen to a song. \"Know\" Informational Queries - When a user seeks information, such as the name of the band or the best restaurant in New York City. \"Go\" Navigation Queries - Search queries that seek a particular online destination, such as Facebook or the homepage of the NFL. When visitors type a query into a search box and land on your site, will they be satisfied with what they find? This is the primary question search engines try to figure out millions of times per day. The search engines\' primary responsibility is to serve relevant results to their users. It all starts with the words typed into a small box.