What does .com stand for?
".com" is the most common and most recognized domain suffix. It stands for "commercial" and is used by mostly commercial websites. However, anyone who wants to register a domain name can register a name ending in .com, whether their site is going to be used for commercial purposes or not.
While .com is the most common of all domain suffixes, .net and .org are also popular. ".net" stands for "network," while ".org" stands for "organization." Again, these domains can be registered by anyone regardless of their intended use. For more information on domain suffixes, including those from countries around the world, visit the Domain Suffixes page.
As a followup to question01's answer, the advantage of a .com address over a .net, .org, etc is that if the user requests a page without specifying the domain, most browsers will append a .com to the end of the string. This is the trick used when there's s popular site not ending with .com.
.com is used for commercial purpose. It is one of the gtld ( generic top-level domain) in the internet. Most of the domain buyers like to buy .com for their website. .com is cheap at .