“Alternative text,” or “alt text” is text associated with an image. It’s usually the file name of that image, but
It’s important for all the images on your website to have alt text because it’s the only way search engines like Google can understand what an image is about, it helps you optimise your website for Google’s search. This is very important to make your site easy to find for your audience. It also makes images accessible to the blind because screen readers can read aloud the alt text.