Aave is a Decentralized non custodial liquidity market protocol where you can participate as depositor or borrower.
You as a depositor provide liquidity to the market to earn a passive income and you as a borrower you are able to borrow in an overcollateralized or undercollateralized manner.
Aave is well audited and secured and open sourced. Aave has two types of fees, 0.00001% is charged on loan amount form borrowers and 0.09% is charged from the loan amount for depositors.
Aave is susceptible to smart contract risk and liquidity risk and it has explore all possible means to reduce the risks emanating from those areas.
Presently its trading volume and trading pairs are zero, so kindly do your due diligence before engaging yourself in trading .