Clash Royal is a real time strategy game that you can play with other players online. Your main aim in this game is to fight with other players by using 97 cards with different rarity and abilities. You can get cards by getting them from chests(which you get from victories), you can buy them in shop, ask them from your clanmates(you can join in clans with other players) or win in special regular events.
There are a lot of differnt abilities in this game and as far you play as more fun and opportunities you will have. Main advantages are: good quality of graphics, big variety of game mods, opportunity to play with friends, there are a lot of differnt ways how to play. But there are some minuses: it is rather hard(really hard), you will have to play a lot to rich big success, sometimes it is very nervous to play and you might become angry easily.
Overall, Clash Royale is a difficult, but fun game with big potential and great gameplay. I'd recommend it to anyone who is elder 12 years old. Because it looks very easy but in fact it is rather difficult. Game is very interesting and it won't let to fill you bored.