VASP, or Vasodilator-Stimulated Phosphoprotein, is a member of the Ena/VASP protein family, which plays a critical role in the regulation of the actin cytoskeleton. It is involved in various cellular processes such as cell migration, adhesion, and signal transduction. VASP is characterized by its ability to bind to profilin and G-actin, promoting actin filament elongation and preventing capping protein binding.