Tiered policing exists in many police services, and it's essentially the top of the pyramid. You would have fully sworn and trained police officers who carry badges, carry guns, have powers of arrest, and so on, and you would have a number of tiers below that. You might have what's called in some places a community safety officer, someone who doesn't have the same level of training and may not carry a gun but who carries out different functions such as neighbourhood engagement, problem-solving at the local level, intelligence collection, and these kinds of functions. They're very much on the ground working with the community and sharing information with police officers who often have to respond to incidents and come into that community.
Then you might have another level below that—volunteers, cadets, auxiliary officers with even less training—doing even more routine functions, such as managing events or securing a site. Those are pretty routine tasks.