Quasirandomness in additive groups and hypergraphs

Quasirandomness is a general mathematical concept meant to encapsulate several characteristics usually satisfied by random combinatorial objects, and which we regard as describing when a given object 'looks random'. In this survey we explore this general concept as it applies to graphs, hypergraphs and additive groups, making clear their many connections to each other and showing how they can be used in order to better study these objects.