The catch is that geofilters only work in certain locations and, in some cases, are only visible for a specific duration of time.
Geofilters are commonly used for saying that you're in a specific city or neighborhood. Recently people have started making their own geofilters for more creative use cases, like proms and birthday parties.
Want to make your own geofilter, but not sure to start? How's what you need to know: