Marketplace was a collection of fonts that you could purchase and add to your Adobe account. It was retired in November 2019; any previously-purchased fonts are still licensed to your account.
Note that Marketplace fonts are not downloaded and installed in the font directory of your computer, and you don't receive a copy of the font files.
For most projects: yes! Marketplace font purchases can be used in a variety of ways without any additional licensing. This includes creating:
What’s more, any digital assets created with the fonts can be delivered to your clients. (Though you can’t include the font files themselves).
Any previously-purchased Marketplace fonts remain licensed to you for both web and desktop use, even if they are no longer available for sale through Adobe. You'll find them under the Purchased tab in My Adobe Fonts.