I'm trying to experiment with different ad sizes around my website but I'm sure many of you have your own experiences already. If you're willing to share, what ad size do you find to perform better and what locations? Thanks!
I prefer smaller size, in terms that it can load quite fast. Avoid bigger sizes of ads as this will consume much of your loading time. Sometimes it depends on the server where your website is hosted on how can it handle the speed or loading time.