How can I add a caption to a photo in a shared Google Photos album?

Question

I have a collection of photos in a shared album on Google Photos. For each photo I want to set a short description as a caption.

Answer 1

This can be done in either the Google Photos app, or the Google Photos website.

1. Tap or click to view a single photo, then select the information button (small "I" icon) to view more details on the photo.
2. Find and select "Add a Description"

Descriptions are saved with the image and will be searchable in the future.

Source: How to add a custom description to pictures in Google Photos