Aave is a decentralised finance protocol that allows people to lend and borrow crypto. Lenders deposit assets into liquidity pools to earn interest and borrowers take out loans by using this liquidity pledging their crypto as collateral. Those who borrow through Aave can alternate between fixed and variable interest rates. While fixed rates can provide some certainty about costs during times of volatility, the borrower might choose to select a variable rate if they think the price will fall in the near future. The project predates DeFi.
AAVE holders receive discounted fees on the platform and have a say in the future development of the protocol. AAVE can also be staked to earn rewards.
Check out this article to choose the most convenient way to buy cryptocurrencies, including AAVE.
NB: For AAVE transfers, NearPay supports ERC-20 network only. All the funds sent via other networks (e.g. BEP-20 etc.) will be lost forever.