okay , can you explain me about the "signature" and "bounty" ?
how do is work ? (sorry for my english^^ )
Signature campaigns pay you for running an advertisement in your forum signature. They can be found here:
https://bitcointalk.org/index.php?board=52.0However they usually require you to have a rank of "Member" or above and expect a certain post quality. Stick around a bit, write constructive posts and maybe you'll be able to join one in a few weeks.
Bounties are usually offered by alt coin, ICO and similar projects, for providing services such as translating texts, promoting the project, etc. You'll find most of those in the alt coin boards.
Last but not least, read this:
https://bitcointalk.org/index.php?topic=1629118.0