The main purpose of our work is to show how dynamical properties of RG-flow at both strong and weak coupling are encoded in the correlators of composite operators. par Working at strong coupling we make use of the AdS/CFT correspondence. In particular we are interested in flows starting from a Superconformal UV theory that are described by Asymptotically AdS (flat) domain walls which may end in the IR into another Supersymmetric CFT or into a gapped phase. In constructing the domain wall backgrounds we will present both a bottom-up approach based on hard-wall models and a top-down approach based on N=2 gauged supergravity constructions. par In both settings we compute the two-point correlators of complete SUSY multiplets such as the Ferrara-Zumino multiplet of the stress energy tensor and the linear multiplet of a conserved current. These correlators will tell us if and how conformal symmetry, supersymmetry and global symmetries are broken along the flow and allow us to compute the spectrum of resonances of the IR theory. par Focusing on SUSY-breaking flows, we will show how our approach gives strongly coupled hidden sectors which can be embedded in the Gauge Mediation setup establishing a non trivial interplay between the geometry of the dual domain-wall and the properties of the low energy spectrum. \ \ - R. Argurio, D. Musso and and D. Redigolo, Anatomy of new SUSY breaking RG-flows: Holographic Correlators and Mass Spectrum (to appear) \ - R. Argurio, M. Bertolini, L. Di Pietro, F. Porri, and D. Redigolo, Supercurrent correlators at weak and strong coupling (to appear) \ - R. Argurio, M. Bertolini, L. Di Pietro, F. Porri, and D. Redigolo, Exploring Holographic General Gauge Mediation, [arXiv:1208.3615]. \ - R. Argurio, M. Bertolini, L. Di Pietro, F. Porri, and D. Redigolo, Holographic Correlators for General Gauge Mediation [arXiv:1205.4709].