Ströer SE & Co. KGaA engages in providing commercialization of out-of-home (OOH) and online advertising as well as forms of dialog marketing in Germany. It operates through the following segments: Digital OOH & Content, Direct Media, OOH Media. The Digital OOH & Content segment provides digital advertising spaces in the internet, on mobile terminals, and in the public area as public video network. The Direct Media segment includes the dialog marketing and product groups. The OOH Media segment offers advertising services such as street furniture, billboard, transport, and outdoor advertising media. The company was founded by Udo Müller and Heinz W. Ströer in 1990 and is headquartered in Cologne, Germany.