Why has my adsense CTR dropped and how can I improve it?

Those who rely on adsense will at some point of their life as a blogger see their CTR wane, it may be at the beginning, it may be later but there are a few things you can do to ensure that you get the best out of your CTR.

Since I changed my blog template, I suffered a drop in CTR and this is likely to do with the fact the black ads were contrasting the white background leading to a brash and bold ad which stood out too much. On your layout page, ensure that the adsense ads match the background.

Other things you can do is ensure that they are borderless, ensure that your keywords which have an effect on the content shown in the adsense ads are relevant. Make sure you place your ads where readers can see them, there's no point having them in a hidden corner. Last of all you can play around with the size of the ad, I have reasonable success with the vertical ad (120 x 600) but traditionally it has a low CTR and the large square (250 x 250) and rectangles (300 x 250) is where the money is.

Last of all and with a lot of thought, you can consider filtering ads - I've dedicated a post to it here.

Once again that's

Colour
Keywords
Borders
Ad Filtering
Placement & Ad Format