What is token approval
In short: permission for a dapp to access and move a specific type of token from your wallet.
These prompts will often appear in MetaMask if you're a frequent user of decentralized exchanges (DEXs) and DeFi in general. Most platforms rely on you depositing or transferring your tokens to them for one reason or another. However, clicking buttons such as 'Transfer', 'Deposit', or 'Move' won't do anything unless their dapp has your permission—as the wallet owner—to do so.
This is why token approvals are necessary: they enable the dapp to access and move your tokens on your behalf.
For more detailed information, see the following site:
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