We calculate the domain’s average ad position using every instance that **this specific ad copy** ran. We also track the total number of advertisers and calculate that average.

“3 of 21 Avg Ad Position” means that this ad placed 3rd (on average) in a field of 21 advertisers (average) for each time it has run. Higher competitor numbers mean a more competitive field, and it takes stronger ad copy to rise to the top.