[globular-toast]

I use the markers to loosely transcribe walking routes from books or the web then tick them off during my walk. I was always curious if this is what they're actually designed for, though.

[stevage]

I most commonly use them for marking the location of my car or campsite when going bushwalking and wanting to be certain I can find them again. Also sometimes for marking annotations I want to add to OpenStreetMap later...

[lmm]

I use them for Audax checkpoints, but given how they work and their iconography I suspect they're primarily for orienteering.