What is the purpose of using alt attributes for images in HTML?

The purpose of using alt attributes for images in HTML is to provide alternative text that serves two key functions: it aids accessibility and enhances the user experience in cases where images do not load.

When a screen reader encounters an image, it reads the alt text aloud, allowing visually impaired users to understand the content and context of the image. This improves accessibility, as it ensures that all users, regardless of their ability to see, can get the information conveyed through images.

Furthermore, if an image fails to load due to a slow connection or other issues, the alt text is displayed in place of the image, giving users a description of what they were supposed to see. This is particularly valuable for maintaining the content context and ensuring that users aren't left confused about the absence of an image.

Overall, the use of alt attributes plays a crucial role in web design by promoting inclusivity and improving user comprehension, making it essential to incorporate this practice when building web pages.