The topic of Web Portals, despite appearing to cover quite a narrow area, is an extremely diverse one. Amongst other things, it covers the technology of portals, how portal software is implemented and the many and varied applications and business uses to which portals can be put. This chapter investigates various approaches to portals research, concentrating on research related to the human aspects of portals and portal applications. It also introduces the idea that as a portal must be adopted before it can be used a worthwhile approach is to consider the portal as an innovation. The chapter then distinguishes between inventions and innovations and argues that there is nothing automatic about adoption of an innovation, and that this adoption can best be investigated through the lens of innovation theory. In particular, the chapter looks at how innovation translation, from actor-network theory, can be used in this regard and offers examples of how this can be done.