What does the attribute 'href' in a link tag indicate?

The 'href' attribute in a link tag is crucial as it specifies the URL or the destination that the link points to. This attribute defines where the user will be directed when they click on the hyperlink. Without the 'href' attribute, the link wouldn't function properly, as there would be no specified target for the link action. It essentially serves as the reference path for the hyperlink, guiding the browser on where to navigate next. This is fundamental in web design and hyperlink functionality, making it clear that 'href' is about the source or destination of the link itself.