--- title: "Study: YouTube in AI Shopping Advice 2026 – Ad Specialist" description: "Analysis of 44,562 AI answers: YouTube is the most-cited domain. Around one in three purchase questions to Perplexity and Google AI Overviews cites a video." canonical: https://www.adspecialist.de/en/studien/youtube-ki-kaufberatung-2026/ --- # Study: YouTube in AI Shopping Advice 2026 – Ad Specialist > Analysis of 44,562 AI answers: YouTube is the most-cited domain. Around one in three purchase questions to Perplexity and Google AI Overviews cites a video. Kanonische URL: https://www.adspecialist.de/en/studien/youtube-ki-kaufberatung-2026/ ## When AI gives shopping advice, it cites YouTube We analysed 44,562 answers from ChatGPT, Claude, Gemini, Google AI Overviews and Perplexity. Across industries, youtube.com was the most-cited domain. For around one in three purchase questions to Perplexity and Google AI Overviews, a video appeared as a source. Here's what that means for brands booking creators. As of 9 September 2026. ## The study in 60 seconds - **Problem**: Purchase research is moving into AI answers, which cite a handful of sources. Being absent from those sources means missing the recommendation. The role of specific creator formats has received little measurement. - **Finding**: youtube.com is the most-cited domain, with 4,581 citation occurrences across 44,562 AI answers. For D2C purchase questions to Perplexity and Google AI Overviews, videos feature in 36% of questions; Instagram appears in 5%, TikTok in fewer than 2%. - **Implication**: Brief creators around their audience's purchase questions. Make integrations easy to cite through titles, descriptions and chapters, agree usage rights and check monthly which videos AI names for your category. ## A YOUTUBE INTEGRATION CAN KEEP WORKING AS A SOURCE AFTER THE CAMPAIGN. A video with a title, description, transcript and chapters is a lasting, machine-readable document. A Story disappears after 24 hours. The video can still be available as a source when someone asks AI about the category months later. ## The measurement in three numbers - **AI answers**: Five systems, 2,013 questions, 22 companies, 1 July–9 September 2026. - **youtube.com**: Most-cited domain: 4,581 citation occurrences, covering 21 of 22 companies. 3,178 videos and seven channel pages. - **Of purchase questions had video**: 651 questions for five D2C stores: 319 cited a YouTube video at least once. ## Which domains do AI systems cite most often? Citation occurrences for domains appearing across at least five of the 22 companies. Clients' own domains and Google grounding redirects are excluded. | Kategorie | Citation occurrences | |---|---:| | youtube.com | 4581 | | shopify.com | 4008 | | reddit.com | 3032 | | otto.de | 1991 | | omr.com | 1818 | | gutefrage.net | 1237 | | linkedin.com | 942 | | idealo.de | 810 | | ebay.de | 798 | | amazon.de | 366 | Quelle: Ad Specialist AI monitoring: 439,236 resolved citation occurrences from 44,562 answers, 1 July–9 September 2026. shopify.com and otto.de rank highly because several companies in the sample are Shopify merchants or Otto partners. YouTube and Reddit are the only domains appearing almost everywhere. ## How often does each system cite YouTube and Reddit? Across all 22 companies and 2,013 questions. Each answer is counted once, regardless of how many videos it cites. | Kategorie | YouTube | Reddit | |---|---:|---:| | Perplexity | 21.6 | 17.7 | | Google AI Overviews | 13.6 | 8.9 | | Gemini | 3.3 | 1.9 | | Claude | 1.4 | 0 | | ChatGPT | 0 | 0 | Quelle: Ad Specialist AI monitoring: 43,132 answers containing at least one source, 1 July–9 September 2026. ## Which platforms appear in D2C purchase questions? 651 purchase questions for five D2C brands in workwear, lighting, lifestyle, farm retail and accessories. Share of questions where the platform was cited in at least one answer. | Kategorie | Share of purchase questions | |---|---:| | YouTube | 49 | | Reddit | 39.8 | | Instagram | 4.9 | | TikTok | 1.7 | Quelle: Ad Specialist AI monitoring: five D2C companies, 13,215 answers to 651 questions, 1 July–9 September 2026. ## How does YouTube's share vary by system? Share of questions with at least one YouTube video cited as a source. | Kategorie | YouTube in the answer | |---|---:| | Google AI Overviews | 36.4 | | Perplexity | 35.5 | | Gemini | 4.1 | | Claude | 3.7 | | ChatGPT | 0 | Quelle: Ad Specialist AI monitoring: five D2C companies, 1 July–9 September 2026. ## Four steps to make your creator content useful as a source - **Collect purchase questions before briefing creators**: What do customers ask AI before buying in your category? Comparisons, durability, care, price. Put those questions in the brief so the video answers them. - **Make integrations easy to cite**: Include the product category in the title, description and chapter marker, alongside the brand. A video titled “best work trousers 2026” is easier to match to that question. - **Plan usage rights and whitelisting**: Creator content reused in Meta Ads has value. So does content that stays on YouTube. Cover both in the contract. - **Measure whether it happens**: Identify your category's twenty most important purchase questions, then check monthly which videos AI cites. Make it a metric someone owns. ## Method - **2,013 questions for 22 companies**: Questions customers might ask AI before buying: purchase advice, comparisons, provider searches and how-to questions. Test and demo accounts were excluded. - **Five systems, ten weeks**: Each question was regularly submitted to ChatGPT, Claude, Gemini, Google AI Overviews and Perplexity from 1 July to 9 September 2026. We collected 44,562 answers, of which 43,132 contained at least one source. - **Sources resolved to domains**: 439,236 citation occurrences. Google grounding redirects without a destination domain — 57,486 occurrences — were excluded. YouTube's share for Gemini and AI Overviews may therefore be understated. - **Three distinct ways of counting**: Citation occurrences count every mention. Answer shares count each answer once. Question shares count a question once if any answer to it cites the platform. - **Our own monitoring and analysis**: We run the monitoring ourselves. The study's analysis is documented in a script and can be repeated for each new period. ## Q&A - **Does this mean Instagram is no longer worthwhile?**: No. In the booking data, Instagram offers the lowest price per thousand views and remains useful for fast reach. This study highlights YouTube's lasting role as a source in AI answers. Both have a place in the mix, with different jobs. - **Can we influence which videos AI cites?**: Partly. Web-search systems can match videos whose titles, descriptions and transcripts answer the question. Briefs grounded in real purchase questions can improve the chances, but there is no guarantee. - **Why is ChatGPT at zero?**: We measure through an API that returns almost no sources. External studies of the web interface rank Reddit as ChatGPT's most-cited source. We report the measurement gap rather than filling it with someone else's figures. - **Are the raw data available?**: Aggregate tables from this page are available on request. Raw answers and individual clients' questions remain confidential. ## Further reading Explore the background to the findings on our blog. - YouTube influencer marketing: the key to authentic reach - AI and influencer marketing: the new content ecosystem - YouTube influencer marketing case study: Duschbrocken ## Related success stories Our case studies show what these metrics mean for individual brands. ## Your success story Book a one-to-one strategy call with Moritz and let's talk about your numbers.