What triggers this issue?
This issue reports pages that link to URLs (both internal and external) returning one of the 3xx (redirection) HTTP status codes.
Why is it important?
For redirecting URLs on your website, this is generally not a problem (although we recommend linking to the destination page directly to avoid unnecessary redirections).
However, when your website links to a redirecting URL on another site, this requires your attention. The URL could have been redirected after you had added a link to it from your page. So, potentially, the link from your website might be pointing elsewhere now.
How to fix it?
Check the pages listed in this report.
Redirecting URLs linked from these pages can be found in the "Internal outlinks to 3xx" and "External outlinks to 3xx" columns.
We recommend replacing both internal and external outgoing links to redirecting URLs with direct links to the destination URL where possible. This will allow you to avoid unnecessary redirections that can increase the page loading speeds for your visitors.
As a minimum, you should check that external redirecting URLs lead to a relevant page or resource.