Click Staking in the left-hand sidebar, then Cardano to see your Cardano staking dashboard. The top row shows totals across all your accounts for each asset, and the rows below show each account separately.

• Available balance: the amount of ADA you can spend or send right now.
• Reward balance: staking rewards you've earned but not yet withdrawn. Withdraw them to add them to your available balance (see Withdraw staking rewards).
• Staked: the amount currently staked. On Cardano this is your whole account balance, including unwithdrawn rewards.
• Validator: the stake pool each account is delegated to.