"Various checkpoints" refers to different locations or stages where people or things are monitored or evaluated to ensure they are following a set of rules, regulations, or standards. Full definition
I keep parents informed about their children's progress at various checkpoints throughout the year; I also clarify to parents that their role is one of support and not of active participation. (ascd.org)
Track the Trek Students study the Iditarod routes on maps and calculate the distances between various checkpoints on the routes. (educationworld.com)
You may have to retrieve certain items, achieve unusual golf trick shots, reach particular targets in a timed lap or race against time through various checkpoints. (gearburn.com)