Important Thing to Know About Private Messages on Google+
If you share a private message to more than one person on Google+ you should be aware that the list of everyone included in the message can be seen by anyone else included, even if you don't +mention everyone in the message body.
To see the entire list of accounts with which the message was shared, a recipient just has to click on the "Shared Privately" link at the top of the post to see icons of all the post recipients. Hover over each one to see the profile name.
That means you should think of all Google+ private messages as CC: not BCC:!How to Create a Private Message
Just in case you didn't know you could send PMs here, here's how:
1. Open a new share box.
2. Delete any circles currently shown in the share box.
3. Either plus mention (type a + and then immediately the name) anyone you want to include OR enter their name in the "Add more people" box.
4. If you use the "add more people" box, remember what I said above: those people can still be seen by other recipients! #gplustips #googleplustips