  VLT instruments and ALMA have revolutionized in the past five years our view
and understanding of how disks turn into planetary systems. They provide
exquisite insights into non-axisymmetric structures likely closely related to
ongoing planet formation processes. The following cannot be a complete review
of the physical and chemical properties of disks; instead I focus on a few
selected aspects. I will review our current understanding of the physical
properties (e.g. solid and gas mass content, snow and ice lines) and chemical
composition of planet forming disks at ages of 1-few Myr, especially in the
context of the planetary systems that are forming inside them. I will highlight
recent advances achieved by means of consistent multi-wavelength studies of gas
AND dust in protoplanetary disks.
