Vague links are one of the most common accessibility issues. If the line of text you have hyperlinked doesn't explain where a visitor will be taken when they click the link, it is not an accessible hyperlink.

Also, a person using a screen reader is often provided with an alphabetical list of all links on a page. This helps them quickly navigate to the content they're looking for. A link like "click here" or "read more" in their alphabetical list would provide no context for where that link will take them.

By comparison, hyperlinking a line like "apply for the Wentworth scholarship" is a clear directive. Screen readers also read links aloud as they encounter them, and hearing "link: click here" lacks context while "link: apply for the Wentworth scholarship" is a clear directive. 

Similarly, website visitors unable to use a mouse can use a keyboard's tab button to jump from link to link. This helps them quickly browse for the content they're after. Again, the line of text you hyperlink should always inform a user of where they'll be taken if they click the link.  

How to create a good hyperlink:

Hyperlinked text should provide information about where a person will be taken if they click your link. 

Example: 

To request website training, book a training date. 
Not: Click here to book a website training session.