Graffiti is an integral part of public space, in cities and beyond. Spreading globally in its contemporary form for almost half a century, graffiti still retains symbolic and social connections to its subcultural origins in 1970s New York. Yet, graffiti is not only an interest of graffiti writers, but of numerous social agents and institutions too, including art dealers, museums, policy makers, academic scholars, journalists, law enforcement agencies and various corporate actors. As a result, the imageries of graffiti writing are bound up with a range of practices, each with its own scope and logic. This chapter taps into some of them. It engages with graffiti as image and practice before proceeding to discuss the suppression and commodification of graffiti writing, as well as the patterns of mobility and permanence in which graffiti often is encapsulated. To this end, the chapter reviews a relatively large (yet far from complete) collection of research, stemming from the humanities, social sciences and (socio)linguistics.