Image filters are tools used in photography and digital editing to alter the appearance of an image. They can enhance colors, adjust brightness, or apply artistic effects, making photos more visually appealing. Common filters include blur, sharpen, and sepia, each serving a specific purpose to improve or change the image's look. These filters can be applied using software like Adobe Photoshop or mobile apps such as Instagram. Users can easily experiment with different filters to achieve their desired effect, allowing for creative expression and personalization of their images.