What are Crypto debit cards?

Could you please explain what exactly are Crypto debit cards? I've been hearing a lot about them lately, but I'm still not quite sure how they work. Are they similar to traditional debit cards, or do they have some unique features? I'm particularly interested in knowing if they can be used to make purchases just like regular debit cards, and if there are any restrictions or limitations I should be aware of. Additionally, how secure are Crypto debit cards, and what measures are in place to protect users' funds?