Metapools allow a single coin to be pooled with the coins from a Base pool without diluting its liquidity. Currently, the most common Base pool is the 3Pool. It uses the three most liquid stable coins (BUSD-USDC-USDT) on the Binance Smart Chain (BSC).
Metapools offer several options for deposits. For example, in the [fUSDT, [3EPS]] Metapool you can deposit the following:
any of the 3Pool coins (BUSD-USDC-USDT)
the 3Pool LP token (3EPS)
To provide liquidity you can deposit one or several of the coins in the pool. Depositing the coin with the smallest share in the pool will result in a small deposit bonus. The distribution of the coins you deposit has no effect on the amount of fees you will receive.
When you deposit one stable coin, it gets split over the four different coins in the pool which means you now have exposure to all of them. The first checkbox, "Add all coins in a balanced proportion", allows you to deposit all four coins in the same proportion they currently are in the pool.
The "Deposit wrapped" option lets you deposit the base pool token (usually 3Pool).
If you don't want to add all of your stable coins, click the "Use maximum amount of coins available" checkbox and enter the number of coins you wish to deposit and click "Deposit".
Press "Deposit" as described above and then complete the two transactions that follow:
Approve the contract.
Deposit your tokens.
After depositing in the pool, you receive liquidity provider (LP) tokens. They represent your share of ownership in the pool and these can be staked for EPS.