  Random walks in cones have the double interest of being at the heart of many
probabilistic problems and of being related to many mathematical fields, such
as spectral theory, combinatorics, or discrete complex analysis. In this
article, we present some key ideas associated with these processes: we will
discuss their definition, the link with Brownian motion in cones, as well as
some recent research topics such as the construction of discrete harmonic
functions.
