Posters became more colorful, flashy and eye-catching in the early 1900s as advertising became increasingly important. In the 1920s and 1930s, posters took on a geometric or design-oriented look as creative directors sought to create arresting visuals that would capture the attention of potential customers. In the 1950s, advertisements shifted back towards simplistic designs in an effort to be more accessible to a wider audience. Modern posters continue to evolve in response to changing trends and viewer preferences.