A.18 WCAG 2.1 Success Criterion 2.4.9 − Link Purpose (Link Only)
Make sure that the purpose of each link can be recognised from the link text alone.
Before Rectification
The button "Find out more" only briefly describes the purpose of this link.
After Rectification
This image shows a link button which clearly describes its purpose, i.e. "Find out more about Customer Experience Testing", instead of just "Find out more" as shown in the "Before Rectification" image above.
WCAG 2.1 Reference:
https://www.w3.org/WAI/WCAG21/Understanding/link-purpose-link-only