Auto set-up
1- Go to https://bscscan.com/
2- Reach the bottom main page
3- Click on Metamask icon "Add BSC Network"
Manual set-up
1. Open MetaMask browser extension
2. The menu reads “Ethereum Mainnet” if it’s your first time switching networks. Click it to access a drop-down menu and hit the ‘Add Network” tab to proceed to the next step.
3. Enter these details into their relevant fields:
Network Name – Smart Chain
New RPC URL - https://bsc-dataseed.binance.org/
Chain ID – 56
Currency Symbol – BNB
Block Explorer URL (Optional) - https://bscscan.com
You're all done !