Question guys, everytime I preview my site whenever I do some editing impressions seem to reflect on adsense. Is it ok? or will I be banned for this.
If the number of impressions produced by you no constitute a substantial percentage of the total impressions you should not have problems. Anyway, you can install the Firefox extension Adblock and activate it on your site to avoid extra impressions.
If you have very, very small number of visitors this can have negative effect in two ways. First, you could get banned since large percentage of impressions is coming from You and second, you are affecting your Page CTR which translates to lower earning per click.