I have seen one case. My friend have a website http://vietnamtours247.com and he starts seo campain with keyword "vietnam tours" and its rank is "35" at 11:30 AM. But at 2:30pm, when he uses backlink-watch to check backlink. Unfortunately, he reiceve back-link come from one site http://giethetseo.blogspot.com. And his keyword out of 1000 on SERP after 30 minutes (He didn't use any blackhat technic ). Someone had caused this problem. It 's really bad thing. Who can help me how to solve this problem? If competitors use this technic or another backhat technic with our page Need more ideas from specialists about this problem. Thanks
this is crazy! just report the blog to google and it will be deleted due to spam. easy fix at the same time, do your own whitehat link building to bring the ranking up