Is it really necessary to apply moisturizing cream during the change of seasons?

I'm curious if it will really get hydrated if I apply a moisturizing cream.
Is it really necessary to apply moisturizing cream during the change of seasons?
I am also curious about what kind of moisturizing cream my friends use.
Which should I apply first, the moisturizing cream or the ampoule?
I'm trying to decide whether a light moisturizing cream or a rich moisturizing cream would be better.
Is it effective to apply moisturizing cream in the morning as well?
I would like to know if applying only a moisturizing cream is sufficient.
I would also like recommendations for moisturizing creams by price range. Where can I find that information?
I'm wondering if it's okay to layer multiple moisturizers.
Ultimately, I'm curious about a moisturizing cream that suits me, but it's hard to find.