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-- Google AdSense
---- Connection Between Interest Based Ads and Low CTR?
martinibuster - 9:26 am on May 8, 2010 (gmt 0)the keyword phrases people are using to find your site seasonal fluctuations that affect how much bidding competition there is how relevant the ads are (although this MAY have something to do with competition because low competition means ads have to be backfilled with other less relevant ads) a rare glitch in Google's algo that affects a SUBSTANTIAL amount of publishers across the board. Glitches that affect a SUBSTANTIAL amount of publishers are rare.
Earnings is the metric that matters. The year over year earnings metric tells more than day/month eCPM/CTR metrics do.
The CTR metric is important because it tells you something about
eCPM as a metric can be misleading because a low traffic high CPC page/section can drive the sitewide eCPM up. If you have twenty pages with a high eCPM that for whatever reason suffer a drop in searches, then the overall eCPM will drop. Sitewide eCPM is not a useful metric. You have to go more granular to gain an insight from the eCPM metric, unless you have low traffic. Sites with low traffic generally cannot gain meaningful insight from any of these metrics.
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