The type of Gas token required may vary across different blockchains, and you don’t need to memorize this right now. When you interact with a specific blockchain, check which Gas token is needed for that chain, and then transfer the required amount of Gas token to that chain.

Common ways to obtain Gas tokens include:

1. Withdraw tokens from exchanges to your wallet on the corresponding chain.

2. Transfer tokens from another chain to the required chain via a cross-chain bridge.

3. If your current chain has a small amount of Gas and other tokens, you can exchange them directly on the chain.

If you don’t fully understand this yet, that’s fine. These operations need to be learned through practice. For now, just understand what Gas is.