From now on, you can tag products in Instagram Stories through Postgrain. This new feature can be found along with the other stickers, as shown in the GIF below:
Choose the Product sticker, select a catalog, and then look for the item you want to tag.
Now just choose the shape of the sticker: colored or gray. Just like any other sticker, you can move it around the image and change the size.
It's important to remember that this feature is only available to accounts that have already enabled Instagram Shopping within the Instagram app. To learn how to create yours, visit the article on our blog.
Note: generally speaking, stickers are not yet available for video scheduling/posting. Thus, it is not possible to tag products in Postgrain video stories, we are looking forward to include the sticker capabilities in videos as well and hope to do so in the near future.