PPI stands for pixels per inch and refers to the number of pixels in a digital image or display. In design, PPI is commonly used to measure the resolution of an image, which determines the level of detail and clarity. A higher PPI indicates that more pixels are used to represent the image, resulting in a higher resolution and greater level of detail. The appropriate PPI for a given design project depends on various factors, such as the intended use of the image, the size of the image and the viewing distance. PPI is particularly important when working with digital images for print, where a higher resolution is needed to ensure the image looks sharp and clear when printed. Lower PPI values are acceptable for designs intended for screen use, such as websites or social media graphics.

See also DPI (dots per inch)