A massive quantity of museums' photographic holdings resides not on gallery walls or archives, but outside of their formal collections, including reference photos and ephemera that are integral to the workings of museums. What Photographs Do explores how museums are defined through their photographic practices. Studied through the prism of the Victoria and Albert Museum in London, this collection asks complex and ambiguous questions about how accumulations of photographs create the values, hierarchies, histories, and knowledge systems of a museum ecosystem. Chapters are comprised of short, auto-ethnographic interventions from museum practitioners, from studio photographers and image managers to conservators and non-photographic curators, who address the significance of both historical and contemporary practices of photography in their work, providing an extensive and unique range of accounts of what photographs do in museums while also expanding the critical discourse of both photography and museums.