Open Discord and go to your server
Click the server name at the top left
Select Server Settings
Go to the Roles section
Create a new role or edit an existing one
Set the role name to your desired tag name
Adjust the role color if needed
Save the changes
Go to the Members section
Assign the role to the users you want tagged
Use the role mention in chat by typing @RoleName
If you want a custom server tag in the server name, go to Server Settings and edit the server name
If you want a server banner or icon tag, upload it in Server Settings under Overview or Branding
If you want a nickname tag, right-click your name and change your server nickname