As the title explains struggling a little and need some advice.
Bit of background: I've been using adsense for around a year now and have made 2/3K but my earnings dropped quite a bit in the last 6 months. I have a website which receives anywhere between 60K up to 200K unique visits a month which comes from organic search results for high(ish) search volume terms. Currently have Adsense turned off while I try to get a better understanding of the system.
Ok so a few things which are playing on my mind, which I believe some to be a problem and some to be things I have done to make things worse.
1. I use the reports to work out what is best, so I see image/rich media ads show the best CPC/CTR so I only show that type of ad - Adsense recommends text/image units. If I turn this on will Adsense optimise the ad to show the best performing, as in if images start to out perform text will image ads show more?
2. I turn off categories which are not performing, how I do this is if the ad impression % is less than the earnings % I might turn it off. For example if a category has 25% impr and earnings have 10% I will turn it off.
3. I'm pretty aggressive with the ad review centre, if it's not related I block it, if it looks spammy I block it and I tend to keep rich media/flash ads because the CPC/CTR is better than anything else.
4. Mobile has cut earnings in half, it's about 25% of the desktop CPC.
Any advice, constructive criticism is very much welcome.