Hi, I have been working on a blog for a few weeks now. Using Google adwords to pick the right selection of competition/monthly searches. I write an article and the next day it will be on the front page of the Google ranking. I'll check a day later it's gone. Sometimes not even on the 2nd or 3rd pages. Why does this happen, and how can it be changed? Because some articles on the front pages are years old. Thanks in advance.