Interstitial Pop-ups

Interstitials are pop-up content which will appear once a website has loaded for users. While these can be useful, they may also cause long-term UX issues as well as affect how search engines are able to crawl a website.

Within our SEO Office Hours recaps below, we cover SEO and website health best practices for these pop-ups and compile Google’s own recommendations for implementing interstitial popups on your website from an organic search perspective.

Legal and age-verification interstitials can affect crawling

May 13, 2022 Source

Interstitials (for example, those that require users to verify their age before browsing) can have a negative impact on crawling and indexing if not implemented properly. Googlebot doesn’t click buttons or fill in forms, so any interstitial that requires those actions before the page is loaded may prevent Googlebot from crawling the content itself. Ideally, it’s recommended to use JS/CSS to display interstitials on top of existing content that’s already been loaded in. Because the content is still being loaded and users can access it after navigating the interstitial, this would not be seen as cloaking.

Google Differentiates Between Legal & Advertising Interstitials

November 15, 2019 Source

Google will generally try to recognise legal interstitials and banners in order to differentiate them from advertising banners. This is to done to prevent them from causing problems when Google crawls the site. The only time this may become an issue is when the interstitial replaces the content on the page and prevents it from being crawled.

Check For Interstitials With Google’s Mobile-friendly Test

February 22, 2019 Source

Interstitials may seem like a quick win for sites, but they cause long-term UX issues. Check your site for interstitials with Google’s Mobile-Friendly testing tool.

Use Flexible Sampling or First Click Free to Allow Google to Crawl Content Behind Paywall

December 14, 2018 Source

For pages with a single sign-on interstitial or behind a paywall, John recommends implementing flexible sampling or a first-click free approach so that Googlebot can crawl these pages.

Legal Interstitials Which Redirect Users May Block Google

November 30, 2018 Source

If you have a legal interstitial, such as an age gate, which redirect a user to a different page and set a cookie, Google will not be able to crawl and index the content. You can use an HTML div overlayed on the page, or use JavaScript to load the interstitial so Google can still see the normal content in the HTML. If you need to redirect a user to a different page, then you could create a different page with content which doesn’t need the legal approval.

Googlebot Can’t Index Content on a Page With an Interstitial

May 15, 2018 Source

Googlebot can’t get past interstitials to the content beyond by clicking any links or the close button, and will try to index the content of the interstitial instead. John recommends serving an intestitial overlay using JavaScript so your content can still be accessed.

Page Layout is Only an SEO Issue for Mobile-Friendly Testing

March 6, 2018 Source

Page layout is only really an issue for SEO when it comes to mobile-friendly testing and the mobile interstitial update.

Pages That Redirect to Interstitials Are Dropped from the Index

December 12, 2017 Source

Make sure pages don’t redirect to interstitials and that they’re kept on the same URL or Googlebot could drop these pages from the index.

Mobile Interstitial Penalty Doesn’t Impact Brand Searches

May 30, 2017 Source

The mobile interstitial penalty doesn’t have any impact on desktop results, and won’t impact brand searches. Using banners within the page are a better option than pop-ups which prevent any content being seen by users.

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