Select Settings in your Metamask browser extension or mobile app
On the Settings page, we want to locate the Networks menu.
Click "Add Network" in the top-right corner to manually add Binance Smart Chain.
Here are the parameters for BSC Mainnet:
Binance Smart Chain
New RPC URL
Block Explorer URL
Save the settings and switch to the BSC network that you have just newly created.
Your wallet address is now BSC compatible!