All, What's New, Mail, Attachments, Meetings functionality

I started up my laptop, opened Outlook 2013and noticed something I had never seen before. 

All

What’s New

Mail

Attachments

Meetings

When you put your mouse pointer on the word All, it shows “show your mail, meetings and other data about this person.”

I appreciate the functionality....able to see mail, meetings and other data about the sender of the email.

But I cannot find any information on this new feature.  How to enable, disable, etc.