Images are what is used to build containers. Each image defines the pieces required to build and configure a container and can be reused many times. The Images section in Portainer lets you interact with the images in an environment.
You can pull images from Docker Hub or any other registry:
You can also view a list of the images that are currently available in an environment, including their IDs, usage states, tags, sizes and creation dates. There are many other options available: