Reshmi Prakashan asked: So, what is a search engine and what does it do?(and – can I run my own search engine on my domain – an analysis)Search engine is a program or a tool that searches for the information on the Internet based on the words which user insert into the search box. After the words are inserted into the search box and when you click on search button the search engine looks into its own database to find out whether it contains those information which the user is actually looking for.There are many major search engines of the web. Why are these considered to be "major" search engines? Because they are either well known or well used like Google and Yahoo. But then, there are lots of other search engines [+]