Google’s filler ads when they are out of inventory
If you are a avid reader of blogs like I am, you have probably started seeing an increase in the number ad blocks inviting people to advertise on Google. These “filler ads” show up for a number of reasons such as bringing in more advertisers. But more often, it would appear, its because the giant ad company is out of inventory. Here is what we found out from some of our contacts within the company.