⠀⠀⠀ You liked one of the fonts from the site Depositphotos, iSotock or somewhere else. You bought a font, and it turned out to be in the .eps format and it can not be installed in the same way as the familiar .ttf font.
⠀⠀⠀ You can save each letter individually and “collect” words by hand. But it’s not very fast and quite inconvenient.
⠀⠀⠀ The best option is the Fontself Maker plugin. On the site you can buy a version for Ilustrator, Photoshop or all at once (so cheaper). We also need a version for Illustrator CC at a price of $20 (you can get a 50% discount if you are a student or a teacher). A small price for such functions, especially if you yourself draw fonts and want to put them on sale. The plugin will pay off very quickly.
⠀⠀⠀ And of course, instructions for use.