Inventory for France Popunder Ads should be evaluated in its real placement context. Confirm which supported push, native, display, pop, video or interstitial opportunities are available, and do not treat a device or geography label as a separate ad format. Review source, site, app, placement, size, device, operating system, browser, connection and time identifiers where available. Ask whether whitelists, blacklists, caps, bid adjustments and exclusions can be applied without rebuilding the campaign. For france popunder ads, the useful inventory is not simply the largest pool. It is the portion that can be reached, measured and controlled under the campaign brief. Record missing identifiers and unavailable controls as limitations, then design the first test around the evidence that can actually be collected. Because this query focuses on popunder delivery, the review should explicitly test how the popunder placement opens, how the creative is rendered, how frequency or repeat exposure is controlled, and whether the destination matches the user's transition from that placement.