There are several reasons why an ad unit may appear inactive:
- Your website doesn't generate unique traffic which means that our web bot is less likely to check your website and activate your ad units.
- Your ad-unit is relatively new (fresh) and our system hasn't yet aggregated statistics.
- Ad unit HTML code hasn't been found on your website by our bot.
- When you have more than one ad unit on a web page, additional ad units may not generate additional traffic because the first ad unit has already amassed unique impressions.