Alt text, short for alternative text, is a descriptive attribute added to HTML code that provides a textual description of an image on a web page. This text is designed to be displayed when the image cannot be loaded or when a user is utilising a screen reader. When adding alt text, it's important to keep it concise, descriptive, and relevant to the image's content or function. Avoid using generic terms like "image" or "image of" and strive to convey the essential information captured in the visual element.
This is considered a must-do part of SEO if your current website and blog post images don’t already have ALT text. Check through your website and add any relevant keywords to the images.