CTA observations are expected to have a large impact on GRB science and provide information on the amount of energy carried by the VHE component, its spectral shape and temporal evolution, and on the presence of internal absorption affecting the intrinsic spectral shape. These observations can be used to unveil important physics, such as the source density and magnetic field strength, the energy of the emitting electrons, and the jet Lorentz factor (i.e. the velocity of the jet), thus bringing new information on shock wave physics, GRB environments and jet properties. (Image credit: NASA/CXC/M. Weiss)