  These notes are intended to be a pedagogical introduction to higher-form
symmetries, which are symmetries whose charged objects are extended operators
supported on lines, surfaces, and etc. This subject has been one of the most
popular and effervescent topics of theoretical physics in recent years. Gauge
theories are central in the study of higher-form symmetries, with Wilson and 't
Hooft operators corresponding to the charged objects. Along these notes, we
discuss in detail some basic aspects, including Abelian Maxwell and
Chern-Simons theories, and $SU(N)$ non-Abelian gauge theories. We also discuss
spontaneous breaking of higher-form symmetries.
