What is the purpose of alt text in images?

The purpose of alt text in images is to describe the content of images for search engines and visually impaired users. This text serves multiple essential functions: it allows search engines to understand what the image is about, which can enhance the image's visibility in search results, thereby contributing to overall SEO efforts. For visually impaired users who rely on screen readers, alt text provides a description that lets them understand the context and content of the images they encounter on a webpage. This makes web content more accessible and inclusive, ensuring that all users, regardless of their disabilities, can engage with the material being presented.

While improving image resolution, optimizing for loading times, and enhancing visual appeal are important aspects of web design and SEO, they do not capture the primary function of alt text, which is centered on providing descriptive information.