Alt Text is abbreviated for alternative text, and it is a crucial part in creating a web design or even creating digital content, serviceable for accessibility and search-engine optimisation. Alt text provides a short description that is added to images in the HTML code in a website so that persons who are visually impaired can understand the content of an image from the screen reader. Alt texts serve to describe what is represented in an image, and as a result, make the digital content very much inclusive and accessible to all its users, irrespective of their physical ability; thus, the content becomes more user-friendly and accessible, in line with the various standards by which web accessibility is established, such as the Web Content Accessibility Guidelines (WCAG).

From an SEO perspective, text-alt is also essential because it helps search engines best in understanding and indexing images. It is because it cannot “see” the image in the way humans do, but by interpreting contexts and relevance to surrounding content, it will understand what the image is all about. Well-written alt text can go a long way in helping a website to be ranked high on search engines, especially on image search results, and draw additional traffic to the site. While writing an alt text, it is important to keep it concise, descriptive, and relevant, employing keywords naturally, without stuffing them. For example, instead of “image of a dog,” a better alt text would be “golden retriever playing fetch in the park.”
Alternate text is a very useful part of the image when it is not loaded because the internet speed is slow or technical problems occur. In this case, without the image, the content appears to them describing what it should show. So it emphasises the importance of proper, meaningful description. Ultimately, alt text is not an SEO weapon; rather, it becomes part of accessible web design that makes the Internet a better place for all and also enhances search visibility and user engagement.