Geocaching used to be really big but now is pretty low key and niche.
A lot of people I talk to have no clue what it is, and the rest know what it is but have some wildly wrong preconceived notions about it. Stuff like "It's only for hikers" (no it isn't) or how the geocaches are only in the woods. I had a friend who literally did not trust me to go geocaching with her because apparently she thought somebody would be waiting at the location of the geocache to murder us. I had to sit her down and show her that a large majority of geocaches are located in bustling cities and on the sides of major roads.
Sucks that a lot of people also just did not understand it. I once told a friend that there's no monetary reward and they looked at me slackjawed. Like yes you just go find things and then when you find it you have the satisfaction of having found it and shared your find with your friends online. You don't make money doing it lol.