Generally, the name slip speaks to its function: The best slips for under dresses allow your dress to slip right over it without catching, usually thanks to the slinky, breathable fabric (like microfiber) or an anti-cling finish
Occasion: This Brown Velvet A Line Long Sleeves Holiday Party Dress with slit styles is suitable for Evening, Holiday Party, Christmas, Military Ball, Black Tie, Formal, Black Tie Wedding Guest, Wedding Party, Gala, Prom, Formal Wedding Guest and other various formal occasions
Said that, I think is a very valuable style trick, so add some (in)famous sprezzatura to any casual/semi-formal look, a new element of colour/texture, almost like an accesory
Try to match your hair to the style of your wedding dress What style or decade is your dress from bohemian, 1960s retro, Audrey Hepburn
Or ended up buying something you didnt need because you were won over by a cheap ticket price