If you've just received your Cash App Card in the mail, you'll need to activate it before you can start using it to make purchases or withdraw cash. This guide from Cashcardhelps will walk you through the process of Activate Cash App Card, including how to find your card number, how to link it to your account, and how to customize your card with a signature or emoji. Whether you're a first-time Cash App user or just need a refresher on how to activate your card, this guide has everything you need to know.