AFINS token smart contract is built on Avalanche protocol, which enables lower transactions costs (lower gas fees) than Ethereum network.  You will need to add Avalanche network to your wallet:

1.  Open your MetaMask wallet and click to Add Network

2. Fill in these details:

• Network Name: Avalanche Network
• New RPC URL: https://api.avax.network/ext/bc/C/rpc
• ChainID: 43114
• Symbol: AVAX
• Explorer: https://snowtrace.io/

Find more information in this video: Connecting Avalanche to MetaMask | Avalanche Tutorials