I recently note Visionnaire have new products, a pre corrector liquid and an emulsion, how do I use these, I just love the serum and use regularly.

I use the Visionnaire serum twice daily under my moisturiser or night cream but recently came across the pre-corrector fluid and emulsion in the Visionnaire range at an airport. I'm confused as to how to use these. I have dry/dehydrated skin generally.
Sinead