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Today's tutorial focuses on the transfer methods within the ERC20 interface. The four commonly used methods are transfer, allowance, approve, and transferFrom. Direct transfer is the simplest method, where Alice can transfer tokens to Bob by calling the transfer method on the contract. For more complex scenarios involving third parties, transferFrom method is used, granting permission to transfer tokens on behalf of a user. This is illustrated with an example where Alice grants Uniswap permission to transfer tokens on her behalf for a future sale to Bob.