  This is an elementary set of lectures on generalized global symmetries
originally given at the Jena TPI School on QFT and Holography, designed to be
accessible to the reader with a basic knowledge of quantum field theory. Topics
covered include an introduction to higher-form symmetries with selected
applications: Abelian and non-Abelian gauge theories in the continuum and on
the lattice, statistical mechanical systems, the Adler-Bell-Jackiw anomaly from
the point of view of non-invertible symmetry, and magnetohydrodynamics.
Mathematical formalism is kept to a minimum and an emphasis is placed on
understanding the global symmetry structure present in well-known models.
