This document provides an overview of collage as an artistic technique, tracing its history from early 20th-century avant-garde movements to contemporary applications. It discusses how artists like Picasso, Braque, and Rauschenberg used collage to critique society and express new meanings, evolving alongside movements such as Dada and Pop Art. The document also highlights the impact of digital processing on modern collage techniques and their diverse uses in art and popular culture.