NBA Top Shot is an application that runs on the Flow network, a decentralized platform that allows people to truly own their digital goods.
Dapper is your trusted account manager for all the exciting experiences found on the Flow network. Think of Dapper as your onramp to enjoying everything Flow has to offer.
Like other account and payment services (for example, PayPal or a Steam wallet), Dapper will store your approved payment methods, your prized digital goods, and your digital currencies.
Check out Dapper's FAQ here.