You can send gifts directly to someone on your Battle.net friends list, or buy digital gift cards if you aren't sure what they want.
: You can gift the seasonal Premium Battle Pass . This unlocks 80 tiers of rewards, including legendary skins and Mythic Prisms for customizable Mythic skins.
: If you prefer giving them a balance to spend as they wish, you can buy a Blizzard Gift Card. How to Send a Gift
: These are used to buy individual skins, emotes, or the Battle Pass in-game. You can purchase bundles ranging from 500 to 11,600 coins as a gift.