CMYK is a colour model that is used in printing to represent the colours in a printed document. It stands for cyan, magenta, yellow, and key (black), which are the four colours that are used in the printing process.
In CMYK printing, these colours are combined in varying amounts to create a wide range of colours. Each colour is printed as a separate ink, and the colours are overlaid on top of each other to create the final image.
The CMYK model is different from the RGB (red, green, blue) model that is used in digital displays, such as computer monitors and smartphones. This means that the colours you see on your screen may not be the same as the colours that are printed on paper.
For this reason, it is important to design your documents using the CMYK colour model, rather than RGB, to ensure that the colours you see on your screen are as close as possible to the colours that will be printed on paper. This will help you to achieve the best possible results when you print your documents.