So it's Google dance day... My ranking for our primary keyword was sitting comfortably under Wikipedia for a week or two in spot 4-5. This keyword is worth a lot of money, and I was quite happy with it's position, given the competition are corporate SEO teams. Monday comes along and the rankings are litterally changing every 30 seconds. 4 -> 10 -> 6 -> 5 -> 10 What gives? I am tracking ranking via unsigned-in Google and market samurai. Do rankings really change this quickly? Should I worry that I will end up at 10?