Properties of Confinement in Holography

We review certain properties of confinement, focusing more on the ones we study using holographic techniques. Then we discuss observables whose unique behavior can indicate the presence of confinement. Using mostly the Wilson loop in the gauge/gravity formalism, we study two main features of the QCD string. The string tension dependence on the temperature while in the confining phase and the logarithmic broadening of the flux tube between the heavy static charges that turns out to be a generic property of all confining theories. Finally, we review the k-string bound state and we show that for a wide class of generic theories the k-string observables can be expressed in terms of the single meson bound state observables.