A font style command that renders text in italicized mathematical form, commonly used for algebraic variables and function names.
Examples
Mathematical italic text in a function name
f: \mathit{Dom}(x) \to \mathit{Ran}(x)
Category theory notation for the category of abelian groups
F: \mathit{Ab} \to \mathit{Set}
Multi-letter variable names in equations
\mathit{Area} = \pi r^2