In an anchor tag, what is typically used to provide a description or additional info when the user hovers over the link?

In an anchor tag, the title attribute is used to provide a description or additional information that appears as a tooltip when a user hovers over the link. This attribute helps improve user experience by giving contextual information about the link without cluttering the interface. The text within the title attribute is displayed to users, enhancing comprehension and accessibility, as it can clarify what the linked content entails.

The title attribute is a standard part of HTML specifications and is widely supported across all web browsers. It is particularly useful for aiding users in understanding the purpose or target of a hyperlink, especially when the link text may be ambiguous.

While other attributes like alt, desc, and info exist in different contexts, they do not serve the same purpose in anchor tags. The alt attribute is primarily used with images to provide alternative text, the desc attribute is not a standard HTML attribute and does not function in this context, and the info attribute does not exist in standard HTML. Thus, the title attribute stands out as the correct answer for providing hover-over information in anchor tags.