  Generalized symmetries (also known as categorical symmetries) is a newly
developing technique for studying quantum field theories. It has given us new
insights into the structure of QFT and many new powerful tools that can be
applied to the study of particle phenomenology. In these notes we give an
exposition to the topic of generalized/categorical symmetries for high energy
phenomenologists although the topics covered may be useful to the broader
physics community. Here we describe generalized symmetries without the use of
category theory and pay particular attention to the introduction of discrete
symmetries and their gauging.
