This is the new look for what used to be Google Communities. You still have access to the communities, which is Google's version of Facebook or Instagram. You are able to post on a wall and see what others in your group are posting about.
I love this for class. I think it is a great supplement to what Google Classroom offers and is more relatable to kids. In the past, we have used this for discussion posts and giving students a platform to post about historical places they visited. I would recommend this for middle and high school teachers.