Media and advertising first arose in ancient Egypt, Greece, and Rome where messages were communicated through wall posters and papyrus. Modern advertising developed in the 1920s with new techniques introduced by tobacco advertising campaigns. The impact of media and advertising on the world includes social media marketing driving brand recognition and sales. Successful social media requires consistent time investment over money. Aggressive political advertisements sometimes reuse past slogans without desired effects. Globally, advertising spending is distributed across television, digital, newspapers, magazines, outdoor, and radio channels. The top media and advertising companies are WPP Group, Omnicom Group, Publicis Groupe, Interpublic Group, and Dentsu.