How do I manually add BNB to MetaMask?

Excuse me, could you possibly explain the process of manually adding BNB to MetaMask? I'm a bit confused about the steps involved. Could you please outline the necessary actions step by step? Would I need to access any specific settings or use a particular tool? Also, are there any potential risks or security concerns I should be aware of while performing this operation? I would appreciate it if you could provide a clear and concise description, as I'm eager to get started with adding BNB to my MetaMask wallet. Thank you in advance for your assistance.