When you add liquidity, you will receive pool tokens representing your position. These tokens automatically earn fees proportional to your share of the pool, and can be redeemed at any time.
Liquidity Provider Rewards
Liquidity providers earn a % fee on all trades proportional to their share of the pool. Fees are added to the pool, accrue in real time and can be claimed by withdrawing your liquidity.
A price oracle is any tool used to view price information about a given asset. When you look at stock prices on your phone, you are using your phone as a price oracle. Similarly, the app on your phone relies on devices to retrieve price information – likely several, which are aggregated and then displayed to you, the end-user. These are price oracles as well.