I notice the value of the CPM goes up and down, is there a way I can control that? It doesn't seem to depend on impressions, what make it change?
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It depends on what ads are showing on your hubs each day. Some advertisers pay more than others.
There is no way for us to control it, except to make sure that the topics we write about are high value keywords.
You can help the HubPages community highlight top quality content by ranking this answer up or down.
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