In Roblox Wing RNG , wings are mainly the thing you roll for: you can obtain different wing rarities, equip them, and use them to fly through the sky. The game description also says wings can be used to craft unique items, and later updates added more wings, filtering, and wing-lock features.

What wings do

  • Let you fly once equipped.
  • Give you different rarities to collect, from common to much rarer wings.
  • Can be used in crafting for unique items.
  • Support trading/collecting goals because newer updates added more wing types and management tools.

Simple example

If you roll a rare wing, you can equip it to fly, keep it locked so you do not lose it, and use it as part of your collection or crafting progress.

Note on the title

Your question says “horse rng” , but the results I found point to Wing RNG / Wings RNG rather than a horse-specific game mode. If you meant a different Roblox horse game, the wing mechanic could be different.

TL;DR: wings in Roblox Wing RNG are for rolling, collecting, equipping, flying, and sometimes crafting.