If I have a spike in traffic (approx doubled) for the last couple of weeks, how important is it to notify Adsense of the increase in page visitors??
I think there's nothing wrong with spike in traffic, as long as it comes from search engine and organic traffic but you should worry if there's spike on clicks
There is absolutely no need to notify them. As long as these are legitimate visitors, there should be no trouble.
No need to contact adsense at all..I guess they don't bother if the traffic is not coming from any paid traffic network site
adsense looks to that and laughs. they only care for people with millions of hits a minute like youtube for an example. Simple individual sites do not need this action