"Please attention" what is coinbase??

Coinbase is a secure online platform for buying, selling, transferring, and storing digital currency. Our mission is to create an open financial system for the world and to be the leading global brand for helping people convert digital currency into and out of their local currency.

• We make buying and selling digital currency easy.

• Sending or receiving digital currency between online wallets, friends, or merchants on Coinbase is free!*

• We handle security and backups so you don't have to worry.

• We are a "one stop shop" - we offer a wallet, an exchange, and merchant tools within one simple interface.

• Coinbase is a platform on which many applications are being built using our API

• Please tall me