January was a very bad month for my website. I saw AdSense revenue dropping as much as 70%, and I am still not sure how much of this was because of issues with my GDPR cookie wall implementation (which should now finally have been fixed).
When I saw revenue drop this much doing January, I did a quick search on Google, and found a forum thread at Webmaster World where people reported similar drops in earnings. Some even same huge 70% drop!
A user named lakybel wrote:
This month is look like started very slow..my earnings are down by 70%.. I get click with 0.01€
Some users said lower earnings was normal in January – but I doubt a drop of 70% is normal?!
If you are having problems with ads not showing and/or low earnings, and your traffic is sufficiently high, I would check if you got a problem with some other technology on your site. One possible cause is, maybe the AdSense crawler is simply not able to access your pages properly.
In my own case, it seems to have been caused by a problem with my cookie wall implementation, which may have prevented the AdSense crawler from crawling my pages in some situations.
Read more about this issue here: Adsense Crawler May Not Like GDPR Cookie-Walls
Lower AdSense earnings doing holidays
It seems, however, a bit lower earnings is to be expected in January. At least if we are to believe the reports on webmasterworld.
A user named mentat also wrote:
The drop is normal, as a lot of campaigns ended on 31.12.2018
I know my own revenue tend to go down a bit on certain times of the year. But, I have, as far as I remember, never seen this huge a drop before. It got the the point where I am now considering taking off AdSense from my site, since I am not earning enough money on it.
It is unlikely I will do this, as there is a difference between thinking about something, in frustration, and actually doing it. Nevertheless, it is a incredibly frustrating situation.
There is not much else to do, than to just keep debugging the issue until you find what is causing it.
- January 2019 AdSense Earnings & Observations - webmasterworld.com