Standard for communication between Tezos apps and wallets.
Add a link or a button to your website to enable one click delegation for your users.
Implement the standard to make your wallet understand requests from apps. Your users will be able to request payment from each other, use your wallet to interact with complex applications and delegate to anyone with one click. You won't have to add support for specific apps or delegates manually.
Implement the standard to make users more comfortable with your application. Instead of holding funds in a temporary wallet, your app can simply communicate with the user's wallet which makes the necessary transactions. That way, users can use their own wallet that they are familiar with.