This is a colourless silicone putty texture eye primer used to help eyeshadow show up better and prevent creasing. It does not have an applicator.
I have heavily hooded eyelids that get moderately oily. Without a primer that prevents creasing I can't wear eyeshadow at all so this product is a game-changer for me. This is not drying, but it's also not moisturizing. If you're familiar with the putty type silicone face primers, this eye primer feels exactly like that. The silicone in this is probably what prevents creasing, so you could also use it under your eye for priming concealer if you like. You could also use it even when you don't apply eyeshadow to simply keep your eyelids from getting oily. Applied in the morning, by night my eyeshadow is still intact. I rarely see any creasing by the time I remove my makeup.
The shade this comes in is "nude" but it's really just colourless after you pat it in. If you are looking for colour-correcting or concealing in your eye primer then this won't do that.
As for intensifying eyeshadow, this does do that(compared with applying eyeshadow on bare skin) by giving you an even base for eyeshadow to adhere to, but as it dries smooth instead of incredibly tacky it won't give you a super "foiled" effect on it's own. It also definitely won't hold on to glitters either.
It comes in squeeze tube with a skinny opening and no applicator so you just squeeze some out and pat/spread with a brush or fingers. Fingers is preferable since it spreads better. Due to this kind of packaging the product doesn't dry out. My only gripe with the packaging is that some product can get smeared around on the lid making it look messy.
This was the only eye primer I could find in stores in Canada at the time, but this is also the only eye primer I have ever used to date and I have repurchased many times because I have never felt the need to change it up. It's usually around 10 CAD at Superstore or Walmart.