Purpose of each link should be clear from link text

[absorpheus]

If no visible anchor text is present, the alt should convey the purpose of the link.

For e.g

Should become

You should include alt tags to your images to fix this.

See:

1. https://dequeuniversity.com/guide/fireeyes/index-issues/issue-details?i=SC244LNK&v=5.2
2. https://github.com/GoogleChrome/accessibility-developer-tools/wiki/Audit-Rules#ax_text_04