We often hear the term resolution when discussing photography. Resolution denotes the number of pixels that are there on an image. Pixels are the tiny dots that make up an image.
The higher the number of pixels, the greater is the resolution. Also, the amount of detail in the image is better too.
A higher resolution is also ideal when printing large images. The standard for printing is 300 dpi. Though dpi (dots per inch) and ppi (pixels per inch) are not the same things they are sometimes considered the same and therefore higher concentration of dots (or pixels) means the image is going to appear sharper, detailed and continuous (not pixelated).
Professionals look for cameras that have a larger resolution. This gives them the ability to crop if required and still be able to print large. It is pertinent to note that resolution is measured in megapixels. One megapixel is equal to one million pixels.