The notion of web search behavior is, as noted at the beginning of this book, a broad concept that may apply to a wide range of phenomena within the larger domain of human information behavior (HIB). Web searching, or web-based information seeking and retrieval, thus needs to be seen in relation to other concepts such as information behavior (IB), information seeking (IS) or information-seeking behavior (ISB), information search behavior (ISchB), information retrieval (IR), and interactive information retrieval (IIR). I will briefly draw on these concepts to describe the theoretical framework that I developed for the study of web search behaviors embedded in translation problem solving.