[2021] What even is Vulkan?

Originally posted by Gremmy: I have the option to open this game with vulkan but i dont know what that is.

Go to your library and click 'play' on Valheim. Will you get a screen saying Vulkan and the normal version?

Here is some more information about Vulkan and Valheim and what it does.
https://www.shacknews.com/article/123349/what-does-play-valheim-using-vulkan-mean