Let’s start with pixels. A pixel is the smallest unit of a digital image that makes up a complete image or video or any visible thing on a digital display. Put simply, they’re the tiny details that form the bigger picture, and a pixel is often in square form to avoid any gaps. Digital cameras capture millions of these pixels via millions of censors, and the term used to describe each group of million is, you guessed it, a megapixel. So a camera with an image sensor that has about 14 million pixels is said to have a 14-megapixel resolution.
Picture a very low-resolution image you’ve seen online, often described as “pixelated”. If you counted the squares, or pixels, that make up the image, you wouldn’t be counting all that many. The more “pixelated” an image, the fewer the pixels. So few, in fact, that you can actually start to make out each one individually. It gives the appearance that it’s pieced together by small blocks, which is actually entirely true. Conversely, the more of these pixels, the sharper the image will look.