A broken link prevents the reader from completing a path, even when the main article remains available. The problem can be with moved files or changed external resources. Maintenance should verify the destination and the relationship between the link and the text that introduces it.
I propose to distinguish internal and external resources, with controls consistent with their importance. A technically accessible page may have content other than the one cited. Verification must therefore also consider the meaning of the reference, especially when supporting an explanation or source.
Let's imagine a button that promises to download a document and instead opens a generic page. The reader can find the site working but not the expected content. Correcting the path requires you to verify which resource is actually available.
The review should leave an easy way to report problems. The expected result is a consistent path between promise and destination. A reliable site keeps important references usable and makes it understandable when a resource has been replaced or is no longer available.