What is the function of alt text?

The function of alt text is to convey the meaning and function of an image to users who cannot see it, making it an essential component of web accessibility. It serves as a textual alternative that describes visual content, ensuring that individuals with visual impairments, who rely on screen readers, can understand the purpose and context of an image. This allows users to navigate the web more effectively, as they can gain the same information as sighted users who can see the image directly.

While visual enhancements, color schemes, and historical context may be relevant in other contexts, these do not fulfill the primary role of alt text, which is to provide access and comprehension of visual elements for users with disabilities. Alt text focuses on succinctly summarizing what an image represents or its functional role within the content, thereby creating a more inclusive web experience.