What is the primary purpose of using alt-text in images on websites?

The primary purpose of using alt-text in images on websites is to provide descriptions for visually impaired users. Alt-text, which stands for alternative text, serves as a textual description that is read aloud by screen readers, allowing individuals who cannot see the images to understand their context and significance. This practice aligns with accessibility standards and ensures that websites are inclusive, enabling everyone to access and engage with the content effectively.

Additionally, while other options may have some relevance, they do not capture the core purpose of alt-text. For instance, enhancing image quality for faster load is not related to the function of alt-text, as that is more about image optimization. Improving search engine rankings can be a secondary benefit of using relevant and descriptive alt-text, but the main focus should be on accessibility. Lastly, making a website visually appealing is a separate design consideration and does not pertain to the functional purpose of alt-text in terms of accessibility needs.