Guide

1. Inside Hootsuite's Composer panel, hover your mouse cursor over the attached image under the Your Post section and then click 'Alt'.

2. Following that, come up with a unique alt text that best describes the image. Enter it afterwards into the 'Alternative Text' input field.

3. Once done, tap 'Add' to proceed.

4. After completing these steps, the alt text will be added to the image file in your Hootsuite post.