Screen printing is a printing technique where ink is pushed through a mesh stencil (or screen) onto a surface, such as fabric, paper, or other materials. The stencil blocks certain areas of the screen, allowing ink to pass through only in specific patterns. This method is widely used for creating designs on T-shirts, posters, and other items because it allows for vibrant colors and durable prints. Screen printing is particularly popular for large orders due to its efficiency and cost-effectiveness at scale.