What Can I Do With Ada?
Ada is a digital currency. Any user, located anywhere in the world, can use ada as a secure exchange of value – without requiring a third party to mediate the exchange. Every transaction is permanently, securely, and transparently recorded on the Cardano blockchain.
Every ada holder also holds a stake in the Cardano network. Ada stored in a wallet can be delegated to a stake pool to earn rewards – to participate in the successful running of the network – or pledged to a stake pool to increase the pool's likelihood of receiving rewards. In time, ada will also be usable for a variety of applications and services on the Cardano platform.
Delegate your stake : https://cardano.org/stake-pool-delegation/
Operate a stake pool : https://cardano.org/stake-pool-operation/
How Do I Buy/Sell Ada?
You can buy or sell ada for fiat or other cryptocurrencies using cryptocurrency exchanges. Visit coinmarketcap to see the list of exchanges that support ada.
As an ada holder, it is important to keep your funds secure, and that means you need to keep your private keys private. It is highly recommended to avoid keeping your cryptocurrency in an exchange longer than necessary, and instead to use a cryptocurrency wallet. We recommend either a full-node wallet like Daedalus, or the browser-based Yoroi.