How do you add friends on Clash Royale?

To add friends on Clash Royale, one must first tap on the social tab, which is the icon with three people located at the bottom right corner of the main screen. Once inside the social hub, they should navigate to the 'Friends' section and then click on the 'Invite Friends' option. They can send a friend request by sharing their unique friend invite link via text, email, or through social media platforms. When another player receives and accepts this invite, they become friends in the game. Additionally, one can also accept friend requests sent to them by others through this same interface.