Gravity appears to be one of the ingredients of open problems that span an impressive range of length scales and several research fields - theoretical and mathematical physics, cosmology, astrophysics. Characteristic examples are the quantum nature of spacetime, vacuum energy and the cosmological constant, dark matter and dark energy, black holes physics. One of the key problems in gravity is the limited amount of experimental guidance. The purpose of this workshop is to bring together leading experimentalists and a handful of theorists and discuss how ongoing and future experiments can lead to new insights on the gravitational interaction. We will cover experiments at all scales, from tabletop to space missions, and across all fields, from gravitational waves and relativistic astrophysics to cosmology and analogue gravity.