Step 1: Create your own Metamask account.

Step 2: Access "settings" and navigate to the "Networks" tab.

Step 3: Add network and manually configure Binance Smart Chain Mainnet with the following details.

Network name: Binance Smart Chain

New RPC URL: Select one from the following link:

Chain ID: 56

Currency Symbol: BNB

Block Explorer URL:

Step 4: Thereafter, select Binance Smart Chain network from the drop-down list of networks on Metamask.