You can invite a friend to Royal Match by following the steps below:

• Navigate to the "Leaderboard" section, 
• Go to the "Friends" tab, 
• Tap on the "Add Friends" button. 
• Scroll down to the "Find Friends" button and tap on it.
• Tap on the "Invite Friends" button to share your request URL. 
• When your friends tap on the link, they will become your friends in Royal Match.