sticky footer ads
Sticky footer ads stay anchored to the screen as a visitor scrolls, keeping an ad visible beyond its original position on the page. Whether to use them depends on the space they occupy and the value they add to your existing ad inventory.
Key Takeaways
- A sticky footer ad remains fixed on screen during scrolling, so viewability stays high even when the original placement has scrolled out of view.
- The format trades screen space for monetization, which makes placement size and frequency important decisions rather than defaults.
- Before rolling one out, check how it affects scroll behavior, page speed and engagement alongside the revenue it generates.
- Testing on a limited set of pages first gives you data to decide whether the format suits your inventory.
For publishers, the distinction between a bottom banner and a floating overlay matters: each occupies the screen differently. Start by identifying the format and placement you are assessing, rather than treating every fixed ad as the same experience.
A sticky footer ad is fixed to the bottom of the viewport, so it remains in view while the page scrolls. Its position and stacking order determine whether it sits above page content and other interface elements, which makes layout and screen space part of the format decision.
Common sizes include 320×50 and 320×100 on mobile, and 728×90 or 970×90 on desktop. The dimensions available to you depend on the placement and site configuration; confirm supported sizes before rollout. Our Ad Manager Hub supports sticky top and bottom banners at 320×50 on mobile and 728×90 on desktop.
| Placement | Where it appears | What to consider |
|---|---|---|
| Footer | Fixed to the bottom of the viewport | May compete with mobile navigation or page controls. |
| Top | Fixed to the top of the viewport | May take space from headers or site navigation. |
| Overlay | Floats along a screen edge or margin | Its footprint depends on position and rendered size. |
| Sidebar | Located in a page margin and optionally fixed | Requires a layout with enough room beside the content. |
These placements are not interchangeable: a sidebar depends on page layout, while top and bottom banners occupy viewport edges. For configuration details, use current setup documentation rather than assuming one implementation fits every placement.
The Revenue Opportunity and the User-Experience Cost
Because the ad remains on screen during scrolling, sticky footer ads can deliver consistently high visibility. That may create an additional opportunity to earn from an impression, but visibility alone does not establish incremental revenue or guarantee a higher eCPM.
Assess the change against the revenue and engagement you would otherwise have had. A persistent unit may cannibalise in-content inventory, interrupt reading, or obstruct navigation and calls to action. Compare total page revenue and relevant engagement measures, not the sticky unit’s impressions in isolation.
Weighing Revenue Against Experience
Potential value
- Persistent on-screen visibility can create additional viewable ad opportunities.
- Performance can be assessed through eCPM and incremental page revenue.
Potential cost
- The unit can take space from content, navigation or conversion prompts.
- More exposure may coincide with weaker engagement or displaced in-content impressions.
Close controls and remembering a dismissal are experience choices, not guaranteed performance fixes. Keep the format only when the additional value outweighs the observed cost to the page experience; otherwise, reduce its use or remove it.
Decide Where to Run It, Then Test and Measure the Rollout
Start with page types and traffic sources where a fixed banner could fit without covering cookie notices, navigation, prompts or essential content. Check the consent state, viewport dimensions and mobile safe areas, including space taken by browser controls.
Before enabling a placement, check keyboard navigation and whether visitors can reach and use the controls beneath it. Exclude pages or ad units where the banner obstructs a key action, and use current setup guidance and key-value exclusion guidance for configuration details.
- Choose a limited set of suitable pages and retain a comparison group.
- Set a frequency cap so exposure is controlled per format.
- Define stop conditions in advance, such as weaker engagement, obstructed controls or no incremental page revenue.
Compare total revenue per page between test and comparison groups, accounting for changes in traffic mix and demand. A higher impression count for the fixed unit is not enough to show that it added revenue rather than displaced other inventory.
| Measure | What it indicates | What to test |
|---|---|---|
| Total page revenue | Whether the placement adds value across the page. | Compare matched test and control pages over the same period. |
| Viewability | Whether the ad is on screen as intended. | Review results by device and placement. |
| Engagement | Whether reading or navigation changes. | Compare page depth and relevant interaction measures. |
| Dismissals and complaints | Whether visitors reject or report the experience. | Review rates by page type and frequency cap. |
Keep the test only when its revenue contribution justifies its effect on visitors. If stop conditions are reached, reduce exposure or switch the format off before expanding to more pages.
Check Google Policy and Consent Before Expanding
Policy compliance and a comfortable page experience are related, but they are separate checks. Review the current Google AdSense and Google Ad Manager policy documentation for the rules that apply to your account, inventory and ad implementation.
A fixed placement is not automatically prohibited, and its position alone does not establish a policy violation. However, suitability depends on how the ad is displayed and whether the implementation meets applicable requirements.
- Confirm the placement follows current AdSense or Ad Manager policies for your setup.
- Check that consent signals are passed correctly and that applicable privacy requirements are met.
- Verify the ad does not cover a consent notice, obscure essential controls or mislead visitors about what they are selecting.
- Review the rendered experience on relevant screen sizes, including how it behaves alongside site notices and navigation.
Consent handling should be checked with the people responsible for your consent management platform and privacy requirements. A placement that prevents someone from reading a notice or making a choice needs correction, regardless of its revenue contribution.
Before expanding, record who has checked policy status and consent behaviour, and resolve any uncertainty with the appropriate platform documentation or support. Pause or switch off the format if policy status is unclear, consent handling fails, or measured revenue and visitor experience no longer justify keeping it.
Frequently Asked Questions
A sticky footer ad is fixed to the bottom of the viewport and stays in view while the page scrolls. A sticky top banner anchors to the top and can take space from headers or navigation, while an overlay floats along a screen edge, so its footprint depends on its position and rendered size.
Common sizes are 320×50 and 320×100 on mobile, and 728×90 or 970×90 on desktop. The dimensions available to you depend on your placement and site configuration, so confirm the supported sizes before rollout. Our Ad Manager Hub supports sticky top and bottom banners at 320×50 on mobile and 728×90 on desktop.
Yes, a fixed placement is not automatically prohibited, and its position alone does not create a policy violation. Suitability depends on how the ad is displayed: it must not cover a consent notice, obscure essential controls or mislead visitors about what they are selecting, and consent signals must be passed correctly.
There is no guaranteed figure, because a sticky footer’s high visibility does not establish incremental revenue on its own. The unit may cannibalise in-content inventory or interrupt reading, so compare total page revenue and engagement between test and comparison pages rather than judging the sticky unit’s impressions in isolation.
Set a frequency cap so exposure is controlled per format, and exclude pages where the banner would obstruct navigation, cookie notices or key calls to action. Define stop conditions in advance, such as weaker engagement or no incremental page revenue, and reduce exposure or switch the format off if those are reached.
