This talk aims to provide a comprehensive overview of recent advances, emphasizing the need for a unifying framework to study long-range interactions. We will review the equilibrium properties of long-range interacting quantum spin systems, focusing on the variable-range quantum XY model and its equilibrium phase diagram. The impact of long-range interactions on the quantum paramagnetic and ferromagnetic phases will be examined. The core of the talk addresses out-of-equilibrium dynamics, including the spreading of quantum correlations, slowdown of entanglement dynamics, suppression of thermalization, and the appearance of long-lived metastable states.