Is my domain name considered my company?

[Vicki G]

I have a domain that I registered with 1&1.com, I have made my website and I am selling stuff as an affiliate. I have been advertising and so on, but alot of the applications ask for my company name. I know nothing of internet business laws, etc. When they ask for my company name and it is required am I suppose to put the name of my website? Please let me know!
my website is cheap games 4 all dot com. I am still not finished with it but I am working on it slowly.