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Google Ads Experiment: Blue Dotted Underlines Appear on Sponsored Sitelinks

by theanh June 10, 2026

A New Visual Shift in Google Sponsored Listings

Google is currently experimenting with a subtle yet distinct visual update to its advertising ecosystem. Recent sightings indicate that the search giant is testing blue dotted underlines for sitelink extensions within sponsored listings. While Google rarely announces every minor UI tweak, the community of SEOs and PPC experts have been quick to document this shift in the search engine results pages (SERPs).

Understanding the Dotted Underline Format

Sitelinks are additional links that appear below the main ad copy, allowing users to jump directly to specific pages of a website. Traditionally, these links are displayed as plain blue text. The new test introduces a dotted underline beneath these links, particularly on mobile devices. This design change is likely part of a broader effort to improve user experience (UX) by making interactive elements more discoverable and visually distinct from the rest of the ad copy.

Who is Seeing This Change?

The update was first spotted by several industry observers on X (formerly Twitter), including Gagan Ghotra and Khushal Bherwani. The reports suggest that this is currently a limited test, meaning not all users or advertisers will see the dotted underlines simultaneously. The test appears to be heavily focused on mobile layouts, where screen real estate is limited and visual cues for clickability are crucial.

Organic vs. Sponsored Listings: A Parallel Trend

Interestingly, the transition isn’t limited solely to Google Ads. Reports from SERP Alert and other monitoring tools suggest that a similar dotted underline format was tested on organic (free) listings earlier in the month. This indicates that Google may be exploring a standardized visual language across the entire search result page to differentiate various types of links and interactive content.

The Intersection with AI-Generated Content

Some observers have noted that these visual changes are appearing alongside Google’s “what people are saying” AI-generated summaries. As Google integrates more generative AI into the search experience, it may be refining its UI to ensure that traditional navigational links—both paid and organic—remain prominent and easy to identify amidst the AI-generated text.

What This Means for Advertisers and SEOs

While a dotted underline may seem like a minor cosmetic change, in the world of digital marketing, any alteration to the SERP can impact Click-Through Rates (CTR). Advertisers should keep a close eye on their performance metrics to see if this new formatting leads to higher engagement with sitelink extensions.

  • Increased Visibility: Dotted underlines may draw more attention to the sitelinks, potentially increasing traffic to deep pages of a site.
  • Consistency: If applied to both organic and paid results, it creates a more uniform look for the user.
  • UX Optimization: The change reflects Google’s ongoing commitment to iterating on the mobile search experience.

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