Joining a guild is a great way to find fellow adventurers on your journey through the Royal Road.
Open the menu on the main screen to access the Guild menu. Here you can see a list of available guilds and you can request to join a guild. An existing guild member can also invite you to a guild.
After your character reached level 40, you can spend gold to create your own guild.
You can level up your guild by doing guild missions, or enjoy various other content, such as battling with other guilds via Guild Wars.