- It can be either displayed as a slideshow or not.
From past issues you can see that even a single link can be considered "other content" as "there is some flexibility case-by-case" even when images are being used as main media:
- Declined by admin
- Type of issue
- Author added their own content
- Mar 2, 2019
When the article consists entirely of a slideshow (and its caption/description) and there's no other content.
When the article uses images/videos/GIFs with captions as the main medium (e.g.: travel blogs that show many photos with captions, step-by-step crafting guides, cooking recipes, etc.).
In the cases above, use images with captions (or even plain paragraph text) following one another.
"Galerias" here uses images as main media, text is only short description. Slideshow must not be used.