Valorant is Riot games 5v5 shooter that enters the realm of gaming to battle the likes of Overwatch. It is currently in a closed beta and starting April 7th more will be able to get in. To do this you need a twitch account. Then follow those streaming the game starting the 7th. Drops will appear as they play giving lucky viewers a chance to jump into the action themselves.
You can will need to link your twitch account to your riot account to be eligible for the drops. You can do so at playvalorant.com or at the riot games site in general.