The term Paid Media is often used in conjunction with the other two types of media: Owned Media and Earned Media.
Paid Media is often referred to as advertising, and often refers to media exposure that is paid for at either a CPM or fixed-fee typed basis (though much advertising DOES get paid for through alternative payments models like Cost per Click (CPC), Cost per Lead (CPL), Cost per Install (CPI) or Cost per Acquisition (CPA).
Paid Media typically consist of these formats/channels: Standard Banners, Rich Media, In-Stream Video, Digital Audio, Native, Paid Search, Paid Social, Digital Out of Home, and of course, traditional offline formats/channels such as TV, Radio, Print (Magazines or Newspapers), Outdoor, Cinema, etc…