The Giant is one of the basic cards you can get when you start playing Clash Royale. It is an important part of early decks because there is no other card that can serve as your tank as you start playing. Giant card is strong early since damages from low level troops are still weaker and you can easily kill them off by using Bomber troop or spells like Arrows.
The Giant has stronger damage compared to tanks like Golem and Lava Hound. It also has higher hit points than its range counterpart, the Royal Giant. It can deal good damage versus Arena towers even in solo. But ideally, having a strong offensive troop behind the Giant is the best way to use it against your opponent.