To find out which billing postal codes users entered during website conversions, you can use a custom variable in Floodlight.

• A custom parameter
• A custom dimension
• A custom attribute
• A custom variable

The correct answer is: A custom variable

Explanation: The answer “A custom variable” is correct.

To measure the billing postal codes entered by users during website conversions using Floodlight in Campaign Manager 360, you should use a custom variable (specifically a string custom variable). Custom Floodlight variables (u-variables) allow you to capture and report on specific details about each conversion that go beyond the standard parameters. By setting up a custom variable, you can pass the billing postal code value when the Floodlight tag fires during the conversion process. This will enable you to analyze and report on the different postal codes associated with your website conversions.

Here’s a relevant link from Google’s official content:

Custom Floodlight variables – Campaign Manager 360 Help: https://support.google.com/campaignmanager/answer/2823222