Pixelated and grainy images are images that appear blocky or blurry due to the visible pixels or grain in the image. This can occur due to low resolution, compression, or other technical factors. While this can be considered a technical flaw in some contexts, in others, it can be used as a deliberate aesthetic choice to convey a certain mood or style.
The aesthetic of pixelated and grainy images is often associated with a retro or vintage style, as it resembles the look of early digital or analog technologies. This aesthetic can also convey a sense of nostalgia, authenticity, or imperfection, depending on the context in which it is used.