A service consists of an image definition and container configuration as well as instructions on how those containers will be deployed across a Swarm cluster.
When the new image notification feature is enabled, the circle next to the image name indicates whether the local image is up to date, with a green circle indicating it is up to date and a red circle indicating that there is a newer version of the image available at the remote registry. A grey circle indicates Portainer was unable to determine whether there is an update available for the image.
Once a service has been created you can scale it to meet your needs, as well as view individual task status and logs.
If you need to undo some changes to a service, you can roll it back.
You can also configure webhooks for your services.