Where a mask is occasional, a cream is the step that runs every day, and this is the deepest part of the shelf on this page.
It is also where the honest answer about this whole category sits. The American Academy of Dermatology says a good moisturizer can plump up skin and make fine lines and wrinkles less noticeable. It adds that the result is temporary, and that you need to apply the product every day to keep seeing it.
That is worth more than it first sounds. A visible difference you can maintain daily is what this category actually sells. Describing it that way is not a smaller promise than the alternative, it is a keepable one. The same source adds that a product containing a retinoid such as retinol may produce a small change.
Neck and décolleté products sit in this part of the shelf too, and they are worth choosing on their own terms. They are formulated and sized for that area, which is why they exist as a category rather than as a use for whatever is already on your face.
Crepey texture, smile lines and a wish for plumper looking skin all bring people here. Those are descriptions of a surface, and a surface is what these formulas address.