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[0:00] Introduction

Welcome to the AI Daily Digest for Sunday, March 15th, 2026 — your weekly roundup edition, covering the best SEO and GEO insights from this week's newsletters.

Since the major daily newsletters take Sundays off, today's episode is powered by the weekly roundups — including Aleyda Solis's SEOFOMO, the AI Marketers Newsletter, and Chris Donnelly's AI Search Mastery.

[0:45] 89K LinkedIn Citation Study

The biggest research finding this week comes from a study of 89,000 LinkedIn URLs cited by ChatGPT Search, Google AI Mode, and Perplexity.

The headline: long-form posts between 500 and 2,000 words get the most AI citations. Mid-length posts between 50 and 299 words come in second. The worst performers? Ultra-short posts under 50 words and very long posts over 2,000 words.

Actionable takeaway: write LinkedIn posts in the 500 to 2,000 word range. Include specific data points, named sources, and a clear conclusion in the first paragraph.

[2:00] Google Branded Query Filter

Google Search Console has rolled out its branded queries filter to all eligible sites. This AI-powered system automatically differentiates branded versus non-branded queries in your performance data.

Your branded query share is a proxy for AI visibility. If AI models are recommending you, branded search volume goes up. Check your Search Console now and establish your baseline ratio.

[3:00] Google AI Link Cards and Query Fan-Out

In a Robby Stein interview, Google confirmed it has taught its AI models to add link cards to the most trusted sources based on query fan-out.

When a user asks a question, Google's AI expands the query into related sub-questions and identifies the best sources for each. If you want to appear in these link cards, you need to be the most trusted source for specific sub-topics.

[3:50] Citations Are the New Rankings

Chris Donnelly's AI Search Mastery newsletter: more than 50% of Google searches now end without a single click, due to AI Overviews absorbing the answer.

Donnelly's framing: 'You're not aiming for ranking high anymore — you're aiming for citations. It feels like SEO in 2009 for early adopters.' Stop optimizing for position one and start optimizing for citation eligibility.

[4:45] Breaking News Traffic Up 103%

Breaking news traffic is up 103% across all Google surfaces, including AI Overviews. AI models are trained on historical data and cannot break news — when something happens in real time, Google surfaces fresh publisher content.

Timely, news-adjacent content — product launches, research releases, industry announcements — gets a structural boost in AI search that evergreen content does not.

[5:30] Claude SEO v1.4 and Perplexity Ruling

Claude SEO v1.4 is live with GEO agent active and Anthropic best practices audit completed. A federal judge has ordered Perplexity to stop using its browser agent on password-protected Amazon accounts — a major legal precedent for AI agent access limits.

[6:10] GEO Tactic: LinkedIn 500–2,000 Word Sweet Spot

This week's tactic: optimize your LinkedIn content for the 500 to 2,000 word sweet spot. Pick your three highest-performing LinkedIn posts from the past 90 days. Expand any under 500 words — add a statistic, a named expert quote, and a clear conclusion in the first paragraph. Republish as a new post.

That's the AI Daily Digest for Sunday, March 15th, 2026. See you tomorrow for Monday's edition. Stay citation-worthy.