A lot of people wonder what a reasonably good clickthrough rate is. Well, here is a good chart for setting your expectations.
I’m sure that .09% doesn’t sound all that good to you but if you’re paying on a pay-per-click basis this may not be such bad news. The intent of this study was to monitor CTRs worldwide and to especially watch what until recently was a declining percentage. It looks like things have stabilized recently with some saying that is because the industry is maturing and banner ads are becoming more effective.
The value of a banner ad impression is also something to keep in mind as you evaluate the success of a display ad. Some studies indicate that impressions have an even better conversion rate than actual clicks. I find that hard to believe but more on that later.