Photoshop is a bit of a complex application, so it’s no wonder this question is placed among the most popular on the topic. Nevertheless, this addition is no more intricate than with other programs. It is possible to browse fonts to it and here is a list of required steps to do so:
Find a font or font pack you would like to use.
Download/purchase a chosen one.
Extract if required.
Install it.
Restart Photoshop and select a font.
Ta-dah! Ready to use.