Poster design gradient background

Quick answer：

Gradient background in poster design refers to the technique of gradually transitioning from one color to another across the background. This creates a visually appealing and dynamic effect that can draw attention and add depth to the poster. Gradient backgrounds are often used in graphic design to convey a sense of movement, emotion, or to highlight specific elements on the poster. They can be created using various software tools such as Adobe Photoshop or Illustrator.