I have a docker-compose.yml file which is bringing up 5 different containers. In order to actually bring them up, I am using a docker-composer up -d.

I like to have some sort of GUI, so I am using Portainer to see my containers, and what I have noticed is that Portainer container list actually has one more field which I've never seen in the docker ps, and that is stack.

Now I've read about stacks in Docker documentation but still don't quite get one thing. My Dockerfile and docker-compose.yml say nothing about stacks, however when I bring my containers up, they are all labeled as stack being the folder where my Docker configuration resides.

What is the usage of this other than classifying that that set of containers belong to the same stack? Can the property be manipulated so that I assign it my personal naming?