When there is enough of a "thing" or said "thing" is so different than anything else before it one can start categorizing the differences and similiars. That is how to get different mediums and genres. Given how most languages are, if it doesn't have a name its hard to talk about.
This is suppose to be helpful, but some people take advantage to stuff various things into a box that actually doesn't fit and if it takes off, the poor works are trapped with that label regardless of how much it doesn't fit with each other. A popular abrasive one is "anime style" despite the fact it rarely has anything to do with the technique of animation and more just throwing anything under a certain cloud of aesthetics regardless of medium. A good many of those said aesthetics don't originate from Japan, for extra irony.
A proper example used is called "rubberhose" this originated from the medium of animation, for general ease of animating. Its a style about deformity. There is no set "skeletons" within characters in rubberhose. Most modern popular example right now is Cuphead. While it was designed as a tool for animating, thanks to its aesthetic appeal it does get used in other media as well.