Interstitial

What Is an Interstitial?

Intrusive interstitials are a direct ranking factor: Google penalizes pages whose content is blocked by pop-ups or overlays — especially on mobile devices. Many website owners lose rankings without realizing it because their newsletter pop-up or cookie banner is too aggressive. The solution lies in user-friendly alternatives: easily dismissable banners, exit-intent triggers, or subtle overlays that don’t cover the content.

An interstitial is a full-page or large-scale overlay (for example a pop-up, overlay, or modal) that covers or interrupts the page content. The user must close the interstitial or interact with it before being able to use the actual page content. Google has made clear in recent years that poorly placed and intrusive interstitials worsen the user experience — and therefore negatively affect rankings.

Technically, Google examines how invasive an interstitial is: interstitials that cover more than 30 percent of the content and are not easy to close are classified as disruptive. Mobile interstitials in particular are often problematic since smartphones have limited screen space. Google evaluates these as part of the “Page Experience” — just like Core Web Vitals. An interstitial with an easily accessible X button is less harmful than one that is hidden. However, legitimate interstitials (e.g. cookie consent banners, login prompts for free content) are tolerated by Google.

In practice, interstitials should be used sparingly and only purposefully: cookie notices are necessary and accepted. Aggressive newsletter pop-ups or age verification pop-ups can burden rankings. When pop-ups are used, they should be easy to close and mobile-friendly. Exit-intent pop-ups (which only appear when leaving the page) are less harmful. Best practice is to test interstitials and observe rankings — ranking drops can often have pop-ups as the cause. For e-commerce, where conversions matter, the balance between aggressive interstitials and ranking losses must be carefully weighed.