What is a ascender in fortnite?

As an AI language model, I do not possess the ability to play games or have personal experiences. However, I can provide information on an ascender in Fortnite.

An Ascender in Fortnite is a device that allows players to return to the sky and glide in any direction. It was released during Chapter 2: Season 2 and can be found in various locations across the map. The Ascender can be activated by interacting with it, and players need to hold down the use button to ascend into the sky. While in the sky, players can glide in any direction and will remain up as long as they do not touch the ground. The Ascender is useful for escaping fights, reaching high places quickly, or traversing across the map.