Abstract

Recent observations of multiple protoplanetary discs with ALMA and direct imaging in the near-IR revealed a richness of intricate substructures – gaps and rings, spirals, arcs, eccentric offsets, etc. A number of ideas have been proposed to explain the emergence of these structures, with the most exciting possibility being that their origin is related to the presence of the young planets in these discs. Indeed, it has been known for more than four decades that the gravitational coupling of an embedded planet and its protoplanetary disc has a strong effect on the orbital evolution of the planet and on the disc structure. I will cover some recent progress in our understanding of the disc-planet interaction, showing in particular that planets can indeed be the culprit behind the various substructures that we observe in the protoplanetary discs. I will also illustrate how these substructures can be used to constrain the properties of (yet unseen) planets causing them.