Weights
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Please read: https://support.google.com/dfp_premium/answer/177245?hl=en
Overview
Often, advertisers need to rotate multiple money page URLs or filepaths (landing pages) at a percentage of the overall campaign as a result of budget or cost allocations.
Note: You cannot rotate safe pages.
Weighted rotation allows you to enter landing page weight as an additional column. The rows will be selected according to their proportional weight. For example, if there are three rows in a feed - rows A, B, and C - and they are weighted 10, 40, 50, respectively: row A will show 10% of the time; row B, 40% of the time; and row C, 50% of the time (over a large number of impressions).
Best practices:
- Weights need not add up to 100. If the total of the weights assigned to each row does not add up to 100, then each row will be weighted according to the percentage of the weight for that row over the total.