In HTML, the ALT tag is used to provide alternative text for an image or visual on a web page. It is one of the fields that can be filled out in HTML code and enables you to add a description of the picture or video if it is not properly displayed on screen. The ALT text provides a text description of an image that search engines can use to improve your web pages SEO. It also helps visually impaired users who use screen readers to hear a description of the image. The ALT tag is required in the <img> tag, and it is important to note that it carries weight in terms of organic search engine rankings. By optimizing the ALT tags of the images on your site, search engines will understand that your image is relevant and logical in relation to the keywords used. However, decorative images, whose primary purpose is to decorate your web pages rather than pass information, do not require alt text.