Clash Royale has a chat function that lets players talk to other users while playing a game so you should make sure to check in regularly with them about who they’re talking to.
Remind them that conversations should only be about the game, and if someone starts asking them other questions or suggests they speak using another app like Snapchat or Instagram they should tell you.
As the chat is public, you should also remind them to never share any personal information like names, links to other social media sites or locations with anyone on the app.
Be aware that some children use third party chat apps like Discord to communicate with other players while gaming. Make sure to ask your child if they’re using any other messaging apps to chat with friends or people they don’t know while playing games online.