Bidding Multipliers feature is a micromanagement tool that allows applying different multipliers to the bids depending on the traffic source.
Let's take a look at the example of optimization via Bidding Multipliers:
If the traffic comes from a specific site, we want our bids to be higher than for all other traffic sources.
In order to add a new bidding multiplier press the Create New List button in the top-right corner of Bidding Multipliers section. A new list form will be displayed:
Click the name of the list to edit it. Press the Add Domain button. You can upload the list of multipliers via CSV file or add them manually from the UI:
Apply the changes. Now when the traffic comes from epom.com all the bids will be multipiled by 1.25.
The Global switcher determines whether the multiplier is used for all campaigns, or if it should be applied to each campaign individually.
If the list is not Global, it can be added for a given campaign on its card via the Bid Multipliers button: