Weighting, also known as creative rotation, lets you rotate which advertisements are served in a single order and adjust the impression distribution of ads by a weight you can determine. Each ad can be assigned a weight between 1-100. The default weight for each ad is 1. An ad’s weight is only factored into its distribution if there are other ads in the same ad location under the same order.
How it works:
The percentage of impressions each ad gets is determined by dividing the ad’s weight by the total weight of all active ads in the same location that have overlapping schedules. This allows you to pick a weight numbering system that works best for you and also lets you add more ads into your rotation without hitting a maximum total weight.
Example 1:
There are 3 pre roll ads under a single order:
Pre-roll ad 1: weight 1
Pre-roll ad 2: weight 1
Pre-roll ad 3: weight 2
Total weight: 4
In this case, Ads 1 and 2 will each get 25% (1/4) of pre-roll impressions while Ad 3 will get 50% (2/4) of pre-roll impressions.
Example 2:
There are 2 pre-roll, 3 mid-roll, and 1 post-roll ad all under a single order:
Pre-roll
Pre-roll ad 1: weight 1
Pre-roll ad 2: weight 3
Total pre-roll weight: 4
Pre-roll ad 1 will get 25% (1/4) of impressions, pre-roll ad 2 will get 75% (3/4) of impressions.
Mid-roll
Mid-roll ad 1: weight 1
Mid-roll ad 2: weight 1
Mid-roll ad 3: weight 2
Total mid-roll weight: 4
Mid-roll ads 1 and 2 get 25% (1/4) of impressions, Mid-roll ad 3 will get 50% (2/4) of impressions.
Post-roll
Post-roll ad 1: weight 1
Total post-roll weight: 1
Post-roll ad 1 will get 100% of impressions