Summary: Links that do not exist are bad links. The difference between a bad link and a dead link: the wrong link is due to the user's negligence and the requested link does not exist. Dead link is the original access to normal, and later because of the changes in the site can not access. happen wrong
Links that do not exist are bad links.
The difference between an error link and a dead link:
Error link is due to user's negligence, the requested link does not exist. Dead link is the original access to normal, and later because of the changes in the site can not access.
Error link occurrence:
The user spelled the domain name incorrectly. The URL address was written incorrectly. The URL suffix is redundant or lacks a diagonal bar. The letter capitalization that appears in the URL address does not match exactly.
Above 3, 4 points of the situation, professional SEO personnel should pay attention to avoid.