The common denominator of the entire opus of Marko Tadić, and his motivating credo according to his own words, is the seek for simplicity in mathematics, in particular in noncommutative harmonic analysis and representation theory. This inspired the title of the conference, and its topic covers different research areas touched by Tadić on his wonderful mathematical journey. These include the representation theory, unitarizability, Arthur packets, automorphic forms, and applications in arithmetic and geometry. The main goal of the conference is to consider the new developments at the cutting edge of the current research in the field, with emphasis on the discussions of the possible new research directions and innovative approaches to the important problems.