As portrayed in Chap. 1, media bias is a complex concept to identify and analyze. To construct a coherent framework to cover different bias types and to understand the state of the art in computer science when dealing with the domain of media bias is crucial to contribute meaningful research. To do so, in this chapter, we give a more detailed overview about media bias theory, as well as provide the results of an extensive literature review on automated media bias detection methods. To start the journey into this thesis here from a common ground zero, we will briefly summarize the general background of bias first.