Hello friends, at present you have a perfect domain name for your site then your site can be growth easily but i don't know why .com is very popular domain name instead then others? Please anyone have specific answer about it then please reply me.

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i don't know either.
maybe you can google it.
prolly it can answer your query.

.com became industry standard from the start as it was created to represent COMmercial usage so it's presence and popularity grew. the search engines have also then trusted this extension more than others and therefore has advantages in terms of ranking

Because most user know about .com they enter .com after website name. But now user know all the extensions.

Dot com will continue to be the best suffix for ever; no other suffix can meet up. Because it was released first and made well known, before the release of other extensions. People are used to type-in of dot com. When you are making name for your site, it makes sense to add dot com, if you want it known, more so you can easily get traffic to your site from search engines if it ranks in first page. The major value is that, dot com ranks better than other extensions on any search engine. Cheers.

So, you've chosen your domain name, but when you go to register it, the .com ... that .com domains are very popular, there are lots of businesses which use other ... name into the URL bar and hit enter, then getting the .com domain is a must. .