need help heavily

i create a main site, but i found it is used before. i don't know if it is been banned by google. now I put many effort into it. but i found i will got nothing back. How to know if a domain is banned / punished by google ?

 

There are many tools available to check. Here is one of them:

http://www.123promotion.co.uk/tools/googlebanned.php

I simply plugged "banned by google" into...Google and found the tool.

 

if the domain is banned by Google all you can do is request a re-inclusion through webmaster tools.

 

To find if your domain banned or not -> Go to Google->type info:yoursitename
If you see your domain you are not banned other wise contact Google. But you need to sure that earlier you were indexed and now you are not.

 

i am afraid if the domain had been banned by google before, google will discriminate it. so you will make more effort to make google trust them again. so do i need use another a domain? my site now already indexed by google. but i am afraid it banned by google before.