Banner Image
All banner images will need alt text, and how you add it depends on whether it appears on a home page or content page.
Content Snippets
Image Grid
You will need to offer alt text for every image in your gallery because they function as links, and every linked image must have alt text.
Multipurpose List
Like simple lists, multipurpose lists also require alt text for every image you choose to use because the image will also function as a link.
Simple List
If you include images in list items that link, you must write alt text for those images even if they would normally be considered decorative. Any image that serves as part of a link requires alt text.
Callout Snippets
Image Gallery Callout
You will need to offer alt text for every image in your gallery because they function as links, and every link must have accessible text.
Spotlight Callout
Your featured image in your spotlight callout snippet will need alt text.
Video Callout
You will need to offer alt text for your video thumbnail because it functions as a link and every link must have accessible text.