It’s good strategy to periodically review your retargeting campaigns to make sure you’re hitting your volume and performance goals. An important part of that is setting the right lookback window for each of your audiences.
This post discusses lookback windows, why they’re important, and how to set or change them in Marin Display.
What is a lookback window?
A lookback window tells Marin Display how far back in time to look in an audience to retarget users. When you create a new audience, Marin Display will automatically start adding visitors to it as soon as they start hitting the pages you’ve chosen. But what if you only want to retarget visitors in this audience for 30 days? Set your lookback window to 30 days and you’ll retarget them up to that number.
Why are lookback windows important?
Lookback windows play a substantial role in your campaign’s impression volume and spend, as well as performance metrics like click-through rates (CTR), cost-per-click (CPC), and adjusted cost-per-acquisition (aCPA).
If you’d like to increase your campaign’s reach, consider lengthening your lookback windows. That’ll allow you to retarget your audience for greater lengths of time and increase your impression volume. However, keep in mind that your CTR may start to drop if you set too long of a window.
If your campaign’s reach is limited by your budget – or if you’d just like to give a boost to your CTR, CPC, or aCPA numbers – consider shortening your lookback windows. This will eliminate impressions you’re serving to your most distant visitors. As you free up budget to retarget your most recent and engaged visitors, you should begin to see more clicks and conversions in your campaigns.
How do I set my lookback windows?
When creating or editing a campaign, your first task is to select the audiences you’d like to retarget, and set your lookback windows for each audience. In the box labeled “Targeting”, look for the “Lookback Window” fields and enter a value for each audience you’d like to target or exclude:
You can set lookback windows for a specific number of hours, days, or months. If you’re new to retargeting, or have recently started retargeting a brand new audience, we recommend starting with a window between 30 and 60 days to get a feel for performance.
Lookback windows work for exclusions, too. In the example above, we’ve created a cart abandonment campaign that excludes customers who’ve made purchases. If you’d like to exclude your customers from your campaign for a specific amount of time before potentially retargeting them for repeat purchases, you can use a lookback window to achieve that goal.
For more information on lookback windows and campaign setup, check out our knowledge base.