Hi Frizzer,

I've had a lot of experience in ad placement over the years. I have had my Adsense account for 15 years now! Also one of my niches has a very high CTR. I regularly got 10 - 20% CTR! So from this I got a lot of test data.

The first thing I recommend is that you set up separate AdSense Ad Channels for each of the ad blocks on your site(s). Then you will know which channels get the most clicks.

If you have a website with a side bar then to get more clicks, you need to put the side bar on the left hand side. Oh, this assumes you have adverts in the side bar of course!

The next best place is to put an advert in the first paragraph of your text. Word wrap the text around the advert. The square or rectangular adverts are best for this (e.g. 250x250, 336x380 sized).

Also an advert at the bottom of your content can do well. I got quite good CTR from the advert just after the closing paragraph of my content.

I don't like adverts at the top right hand side of the page. In other words adverts opposite the site logo and above the top menu. They never really have good CTR for me. Just bear this in mind because too many WordPress templates put an advert block in this space!

I prefer to put an extra menu there, or a search facility can work well in that space. On Niche Laboratory you can see I put the social buttons there. I don't get much traffic from them - it's a rubbish part of the screen to be honest!

As far as advert types go, image ads always do better for me than the text link ones. I also do better turning personalised ads off.

Finally remember that CTR depends more on the niche than anything else. Some niches have huge CTR, and you will get a high CTR regardless of where your adverts are. Dating has an incredibly high CTR.

Good luck!