Oh no, Google Adsense is displaying irrelevant ads on my site. I may lost some valuable clicks. I had a lookup on their support page, and found the explanation. If you encounter this error, try read that first.
There are few reasons but not one match until I get more details on Site Diagnostic Entry. It mention the crawler report is updated weekly.The crawl is performed automatically and we're not able to accommodate requests for more frequent crawling. What I assume is when I first host my blog with adsense, the page title and content is Testing. So, Adsense had use the Testing keyword and until now still remain. According to them, the crawler will update weekly and refresh my Adsense keyword. By the time, I hope this issue solve.