This page depicts violations of Success Criterion 2.4.4 Link Purpose (In Context).
Ambiguous Link Text
Sample One: Web Aim's article on link text has URL that just reads "click here."
Sample Two: WCAG Providing link text that describes the purpose of a link
Why Is This a Violation?
In the first sample the use of "click here" presents an issue for the non-sighted person using a screen reader. They will frequently pull up a list of all the links on a page. If they only hear "click here," how will they understand what it is they're meant to click on? In addition, revealing the entire URL with domain and path as depicted in sample two also creates a challenge for the non-sighted person using a screen reader as that list of all the links on a page will be very verbose to have to parse through.
How Do I Fix It?
Create a meaningful description of the URL that informs a user the purpose of the link in context to the content.