This is just raw data. Quality or type of community is not considered. That would be for a later article if you want.
Also this is probably very sparse. Feel free to suggest more.
3. 280 Group: Product Management & Product Marketing (Linkedin)
41,700+ members
https://www.linkedin.com/groups/2193/
![](https://res.cloudinary.com/jbrieu/images/f_auto,q_auto/v1585780143/image-4/image-4.png?_i=AA)
![](https://res.cloudinary.com/jbrieu/images/f_auto,q_auto/v1585780152/image/image.gif?_i=AA)