[Help] i won and ... now ... ?

Just wait till the giveaway creator sends you the game. If it's a key, the code will probably appear at some point in your won giveaways section.

The creator has a week to send the key. Just be patient and wait for the key to appear, or for them to add you on steam!

Registered
3 days ago

You lucky >:(

Ok, thks :'D

Congratulations :D

Wait for the creator of the giveaway to send you the game. He has up to a week to do so. Most of the time people choose to deliver prizes by sending you a key visible on your won giveaways page, but they might also choose to send your gift through email or through Steam chat (watch out for a friend invite).

Wait. the giveaway creator will send you a gift directly to your won page or contact you via steam or other means within the next 7 days.

Normally you shouldn't contact the gifter yourself before these 7 days are over - doing so is often considered rude. Gifter normally know what to do now :)

Anyway, Congrats!

After you get your new game, make sure to activate it on your own account. Giving it to someone else or selling it is against the rules. See more here and here.
Edit:
Also, if everything is in order , mark the GA as received.