Recently the company announced on its blog that Android and iOS users can add descriptions (also known as Alt Text) to an image in a tweet. This will help the visually challenged users understand what image is accompanying a tweet better. 

“With this update, we’re empowering everyone to ensure content shared on Twitter is accessible to the widest possible audience,” the company wrote in a blog post.

With the help of screen readers and Braille displays the description can be read. The description can be as long as 420 characters. 

Users will have to enable this feature by checking the ‘compose image descriptions’ option given in the Twitter app’s accessibility settings. Once enabled, users will see an add description button for every image they upload.