Quote Originally Posted by bankok View Post
.com is used much and remembered as it is used for commericial.
.net is network
.info is information and stuffs
The fact is that Com domains have been around for a very long time and they have gained much authority and reputation. For example, it is a common observation that when a first search result is a website with relatively new extension (e.g. .info) and next two results are Com domains, most people will subconsciously follow the second or the third link.

Secondly, since Com domains are the oldest ones, they tend to have many quality aged backlinks and that gives them a sound advantage. Finally, Com TLDs sometimes refer to “commercial” websites and therefor are ideal for business or brand sites.