If you see error Too many activation attempts on Steam when trying to redeem a retail key for your video game, use these ...

Hide Gameplay Activity from Steam Chat Hide played Games from your Steam Profile If you want to play some game secretly, you wouldn’t want all your friends to get any notifications about it.

Steam allows multiple people to have the same username at once. This makes getting the display name you want easier, but often causes a problem when trying to look up a specific account.