Adobe Stock is deeply integrated with Creative Cloud Libraries. You can add a watermarked preview of a stock image to any of your libraries directly using the Adobe Stock website. Then, in Creative Cloud apps that support Libraries—Photoshop, lllustrator, InDesign, Premiere Pro, and After Effects—you can drag the watermarked stock image from the Libraries panel to your creative project. When you're satisfied that the stock image is appropriate for your project, you can choose to license the stock image directly from within the Libraries panel.
Creative Cloud apps that support library-linked assets—Photoshop, Illustrator, and InDesign—take this integration a notch deeper. When you license the stock image, all linked instances of the stock image in your open documents are automatically updated to the licensed, high-resolution stock image without the watermark.
For more information, see Using Adobe Stock.