Here is a video explaining the difference between dpi and ppi.
DPI stands for “dots per inch” and it refers to the number of dots of ink used when printing a photograph on paper. The higher the DPI, the more dots of ink are used, resulting in a higher quality print. When professional printers print a photograph, they will typically use a resolution of 300 or higher, which is considered high-quality.
PPI stands for “pixels per inch” and it refers to the number of pixels in an image. The higher the PPI, the more pixels are used, resulting in a higher resolution image. When printing an image, a resolution of 300 or higher is typically used, which is considered high-quality.
The main difference between DPI and PPI is the type of devices they refer to. DPI is used when printing images on paper, while PPI is used when viewing images on a digital device, such as a computer monitor or smartphone.
When printing an image, it is important to have a high DPI, as this will result in a higher quality print. However, when viewing an image on a digital device, a higher PPI is not necessarily better. For example, a smartphone with a high-resolution display (e.g. 1080P) will look just as good as one with a lower resolution (e.g. 720P).
DPI and PPI are both important concepts to understand when it comes to digital photography. DPI is used when printing an image on paper, while PPI is used when viewing an image on a digital device. The higher the DPI or PPI, the higher the resolution of the image and the better the quality of the print or display.