Image resolution refers to the amount of detail an image holds, typically measured in pixels per inch (PPI) or dots per inch (DPI). Higher resolution images have more pixels, resulting in clearer, sharper visuals suitable for printing or digital display. Low-resolution images may appear pixelated or blurry when enlarged. Understanding image resolution is crucial in maintaining the quality of photos for various purposes, such as printing high-quality materials, online product displays, or social media content.