Can you explain the main statuses that a backlink can have in Monitor Backlinks?

Here are the main statuses for backlinks in Monitor Backlinks:

• F (followed): The link was found and it passes link juice.
• mni (meta noindex): This page will not be displayed in Google search results, but it still passes PageRank.
• nf (nofollow): All links on this page are not followed by Google, so they will not pass any SEO value (PageRank).
• bnf (backlink not found): The link was not found on this website.
• sd (server down): The server or domain was down when we crawled it. This can be because a temporary server problem or because the domain has expired.
• 404 (404 Not Found): The page does not exist on this domain. Check if your URL was correct.
• rb (robots.txt blocked): Google is not allowed to crawl this page, so it won't improve your keywords rankings. You can verify /robots.txt.
• 302 (302 Moved Temporarily): The link is in most cases a bad SEO redirect and it will be ignored by Google.
• " "   (will be checked soon): The link has been added and our system will process it very soon. You will be notified when it's ready.
• 500 (500 Internal Server Error): There was an error on their server. It can be temporary and it needs to be fixed by them.
• 403 (403 Forbidden): The server restricted us to crawl the website or there was an error on their part. You should manually check this link.
• 302 (302 Found): The link is in most cases a bad SEO redirect and it will be ignored by Google.
• wa (wrong anchor): The link was found. It's ok from SEO point of view, but it doesn't match the anchor text that you specified when importing the link. 
• 503 (503 Service Unavailable): There was an error on their server. It can be temporary and it needs to be fixed by them.
• mnf (meta nofollow): All links on this page are not followed by Google, so they will not pass any SEO value (link juice)
• 302 (302 Object moved): The link is in most cases a bad SEO redirect and it will be ignored by Google
• 400 (400 Bad Request): The requested page could not be processed because of an error on their side.
• 410 (410 Gone): The page has been removed permanently.
• 503 (503 Service Temporarily Unavailable): There was an error on their server. It can be temporary and it needs to be fixed by them.
• 301 (301 Moved Permanently): The link is a good SEO redirect, but we were unable to search for a link because the last page had an error.
• 401 (401 Authorization Required): There was an error on this URL. It requires authentication to view it. It's not good for SEO.
• d (disabled): We won't check this link because you manually disabled this from the edit panel.
• c (Checked): The link has been added and our system will process it very soon. You will be notified when it's ready.

Updated on: 14/08/2019