What is the difference between images with a resolution of 300 ppi and 72 ppi, and how does it affect the quality of the image?

Images with a resolution of 300 ppi have more pixels per inch than images with a resolution of 72 ppi. This means that the higher resolution image will have more detail and sharpness, resulting in a higher quality image when printed. The lower resolution image may appear pixelated or blurry when printed at a larger size.