I am only in groups that are NKT (NeuroKinetic Therapy) related for those certified in that modality. I have never been much of a social media aficionado, and the latest revelations have made my withdraw from Facebook even more.
I am only in AA (athletes Acceleration) private groups/paid. And as Karin mentions above, am certified in that modality: speed and agility.
They all have something different to share: Twitter vs. FB vs. Linkedin for example. I only post where I’m followed.