What is Photoshop?
Adobe Photoshop is probably known to everyone, especially since it is now even used as a verb (photoshopping an image). Since its inception around 1988, Photoshop has become the standard in the imaging industry. The software enables the processing of rasterized images in multiple layers, supports image masks, alpha channels and various color spaces such as RGB, CMYK, LAB and duplex.
How do we use Photoshop?
Photoshop is used for the processing and preparation of rasterized image material.
There are hardly any significant alternatives.