The technique developed by the painter Seurat that uses small dabs of color laid side by side is known as Pointillism. It involves placing individual dots or small strokes of paint in such a way that they blend together when viewed from a distance, creating a vivid and highly detailed image. Seurat believed that this technique could create a greater sense of luminosity and vibrant color in his paintings, and it has since become a popular technique among artists around the world.