Writing “click here” to link to a web page or electronic document is intuitive for the writer. But not to all readers. This is particularly the case for people who use screen readers. Writing “click here” or “download here” requires the reader to make sense of the words before and after to get the context. This is workable when you can visually read the page. However, a screen reader is a machine and can’t do this for the user.
It’s hard for a user navigating the page audibly if the link text isn’t clear. They can’t be sure where the link will take them. When a link has a focus the link text is announced by the screen reader. If it isn’t created clearly it can be difficult to understand. Link text is clear when it makes sense on its own away from other text.
Once you know how a screen reader works, it makes more sense. It makes even more sense when you hear a screen reader working. Online newspapers, such as The Conversation, are good at using clear link text.
CanAXESS blog has a seven minute video explaining why “click here” isn’t helpful and gives examples of how to avoid it. The key information is in the first five minutes and the last two relate to the WCAG guidelines which don’t cover this very well.