Forum Discussion
Differences in Team Sites and Hub Sites
I would say that if you need to share look and feel, search capabilities, navigation (as pointed out by jcgonzalezmartin) AND provide an aggregate view of information (news, events, documents) from multiple sites you would benefit from a hub site. In this case I would recommend that you 1) create a communication site 2) register it as a hub site and 3) tie your team sites to the hub site.
Tim HunterIf everyone is only going to use Teams, then Hub sites won't provide any value. However, this is impossible to predict because you never know what people are going to do :).
When people are using SharePoint in the Browser, Hub sites provide the features mentioned by the others in this conversation which can be very helpful for people that need to easily navigate between several associated sites (which can be a lot of users) and for people that need to see rolled up information from multiple sites.
Keep in mind that Teams doesn't provide a great way to do all things that SPO does, i.e. News Posts, so I'm recommending to my clients that they create Hub Sites because they provide a lot of value for very little effort.