Gmail and Google+ changes
Google further blurs the line between Google+ and Gmail
Some people may like this feature, but I'm pretty sure lots won't. You can turn this feature off though:
http://www.androidcentral.com/how-te...gle-e-mail-youHow to keep just anyone on Google+ from sending you Gmail
The Gmail / Google+ change is happening incrementally though, so you may not see the options in your Gmail settings at the moment (note, options will show up on the desktop browser version of Gmail). You should get an email from Google saying that the integration is occurring, at which point you will have the necessary options in your Gmail settings.
via Blogger http://www.browngeek.net/2014/01/gmail-and-google-changes.html