Is there a principle behind skin regeneration cream and an effective way to use it?

My skin is a mess, just like in the photo.

As my skin concerns increased, I became interested in skin regeneration creams.

I am curious about the principles by which skin regeneration creams help restore the skin and whether they actually have a regenerative effect. I would also like to know the difference between using it morning and evening, as well as how to apply it to ensure good absorption. Please also recommend ingredients or suggest products that go well with the cream, based on the skin regeneration cream itself.