A Lightning Address is like an email address that you can use to receive bitcoin over The Lightning Network.
Every Fountain user has a Lightning Address connected to their Wallet. This address will be assigned automatically when you create your account and will be updated whenever you change your Fountain user name.
To receive money, share your Lightning Address and you can get paid from any Bitcoin Lightning Wallet. You can share your Lightning Address from your Wallet and your Profile via the three-dot menu.
To update your Lightning Address, go to Settings > Account > Lightning Address.