Impact of AI Search Summaries on Website Traffic

A difference-in-differences study of Google's AI Overviews (AIO) found that default AIO availability reduced English Wikipedia's external search traffic by 5.45% versus German and 4.82% versus French, according to the arXiv paper "Impact of AI Search Summaries on Website Traffic: Evidence from Google AI Overviews and Wikipedia" by Mehrzad Khosravi, posted 5 Feb 2026 and revised as v6 on 2 Sep 2026. The paper attributes the decline to AI-generated answers displayed above organic links and concludes that answer-producing digital intermediaries can materially reallocate attention away from informational publishers, with implications for content monetization, search platform design, and policy.

Computer Science Computers and Society Submitted on 5 Feb 2026 v1 https://arxiv.org/abs/2602.18455v1 , last revised 2 Sep 2026 this version, v6 Title:Impact of AI Search Summaries on Website Traffic: Evidence from Google AI Overviews and Wikipedia View PDF https://arxiv.org/pdf/2602.18455 HTML experimental https://arxiv.org/html/2602.18455v6 Abstract:Search engines increasingly display AI-generated answers above organic links, potentially displacing traffic to upstream publishers. We estimate the impact of Google's AI Overviews AIO on Wikipedia's search traffic using AIO's staggered geographic rollout and Wikipedia's multilingual structure. Our difference-in-differences design compares monthly external-search referrals to English Wikipedia articles with referrals to the same articles in German and French, and finds that default AIO availability reduced English search traffic by 5.45% and 4.82%, respectively. Our results suggest that answer-producing digital intermediaries can materially reallocate attention away from informational publishers, with implications for content monetization, search platform design, and policy. Submission history From: Mehrzad Khosravi view email https://arxiv.org/show-email/b75349c8/2602.18455 Thu, 5 Feb 2026 01:31:44 UTC 1,474 KB \ v1\ https://arxiv.org/abs/2602.18455v1 Thu, 26 Mar 2026 01:10:28 UTC 1 KB \ v2\ https://arxiv.org/abs/2602.18455v2 withdrawn Fri, 17 Apr 2026 20:18:13 UTC 1,488 KB \ v3\ https://arxiv.org/abs/2602.18455v3 Tue, 12 May 2026 07:35:59 UTC 1,488 KB \ v4\ https://arxiv.org/abs/2602.18455v4 Wed, 26 Aug 2026 07:40:54 UTC 51 KB \ v5\ https://arxiv.org/abs/2602.18455v5 v6 Wed, 2 Sep 2026 20:53:31 UTC 1,812 KB References & Citations Loading... Bibliographic and Citation Tools Bibliographic Explorer What is the Explorer? https://info.arxiv.org/labs/showcase.html arxiv-bibliographic-explorer Connected Papers What is Connected Papers? https://www.connectedpapers.com/about Litmaps What is Litmaps? https://www.litmaps.co/ scite Smart Citations What are Smart Citations? https://www.scite.ai/ Code, Data and Media Associated with this Article alphaXiv What is alphaXiv? https://alphaxiv.org/ CatalyzeX Code Finder for Papers What is CatalyzeX? https://www.catalyzex.com DagsHub What is DagsHub? https://dagshub.com/ Gotit.pub What is GotitPub? http://gotit.pub/faq Hugging Face What is Huggingface? https://huggingface.co/huggingface ScienceCast What is ScienceCast? https://sciencecast.org/welcome Demos Recommenders and Search Tools Influence Flower What are Influence Flowers? https://influencemap.cmlab.dev/ CORE Recommender What is CORE? https://core.ac.uk/services/recommender arXivLabs: experimental projects with community collaborators arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs https://info.arxiv.org/labs/index.html .