Currently the Flag feature, on answers, offers five choices. Three of them request moderator attention:
Not an answer
Very low quality
In the spirit of reducing the burden on moderators, and ...
More than often I get a lot of itch when I see an answer which contains only a link. For example this one.
Check this link, it will solve your query..
I usually flag answer containing only a link as "Other" and write a comment to the mod such like "Link only answer". Anyway the flag was declined with the statement:
Links only answer – 4 hours ago ...