It has been discovered recently that the Massey product in Galois cohomology can be effectively applied to study cohomological invariants and torsors of algebraic and finite groups. This workshop will essentially focus on this new emerging approach. It will feature talks on the latest developments in Galois cohomology, cohomological invariants, torsors and applications of Massey products given by senior specialists and young researchers. A mini-course on Massey products aimed at graduate students attending the workshop is also being planned.