Any member can join and have Add/Edit/Delete access to all the assets of an Office 365 Group (SharePoint Site, Planner, Calendar, Teams). Public Group means everyone can join it freely without obtaining permissions from the Group Owner. Let me explain the difference between the two. No matter which option you choose, you are prompted to only choose between the two privacy/security options: Public or Private. There are plenty of ways to create an Office 365 Group. Security management is more straightforward with Office 365 Groups. So no more accidental sharing when you inherit permissions from a parent site! Office 365 Groups, as well as Communication Sites, are not subsites in a site collection, but rather are separate site collections themselves. Lots of decisions and pain posts from the post/section above have been resolved with the move to flat site architecture.
Yep, this was pretty much the experience for many in the “classic” SharePoint Public vs. As you can see from the length of that post, there were LOTS of decisions a Site Owner had to make to ensure the site security was done correctly, and the site was indeed secure. I wrote a separate post on this a while back. Seriously, it was not an easy thing to understand and explain. in SharePoint to manage security on their sites.
Prior to Office 365 Groups, Site Owners were required to have a Ph.D. How Security works with classic SharePoint sites Private Office 365 Groups privacy settings. With this post, I would like to explain how security works for Office 365 Groups, in particular, explain the concept of Public vs. Specifically, the security management of a site. Introduction of Office 365 Groups has significantly reduced the anxiety for Site Owners to be familiar with ins out outs of SharePoint Information Architecture.