How do I add a WBNB?

Could you please explain the steps I need to take to add WBNB to my crypto wallet? I'm a bit unfamiliar with the process and would appreciate a clear, step-by-step guide. I've heard that it's a necessary token for certain transactions, but I'm not sure how to proceed. Could you also tell me where I can find reliable information on WBNB and its uses in the crypto world? Thank you for your assistance.