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Digital Marketing Morning Briefing (Dec 29, 2025)

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If your dashboards have felt a little “extra” this month, today is your line-in-the-sand: Google’s December 2025 Core Update finished rolling out on Dec 29 (about 2:05pm ET), after starting Dec 11 (about 12:25pm ET). Search Engine Land

Below is what matters (and what to do next) across SEO, paid media, and the ever-expanding “AI as a storefront” trend.

1) Google’s December Core Update is officially done. Now the real work starts.

What happened

     

      • In 2025 there were 3 confirmed core updates (March, June, December) plus one confirmed spam update (August). Search Engine Land

    What to do today (practical, not mystical)

       

        • Annotate Dec 11–Dec 29 in GA4/GSC, then compare pre vs. post on a consistent window (e.g., last 7 days vs prior 7 days, then confirm with 28-day view).

        • If you dropped: don’t flail. Google reiterated the evergreen guidance: core updates don’t come with a single “fix”, you’re looking for overall content and site quality improvements.

      • Watch for patterns by directory / template type (product pages vs blog vs UGC vs programmatic location pages). Core updates often “judge” page classes, not just individual URLs.
       

      2) 2025’s SEO meta-theme: “GEO” went mainstream… but it’s still fuzzy.

      Search Engine Journal’s 2025 review notes that Generative Engine Optimization (GEO) became a bigger part of the conversation, largely because clients are asking how to show up in AI-driven discovery. It also flags WordPress ending the year on a stronger footing for AI-era innovation (with WordPress 6.9 mentioned as a key end-of-year milestone). Search Engine Journal

      Actionable takeaway: treat “AI visibility” as an extension of fundamentals, clean architecture, credible entity signals, and genuinely useful content, then layer on structured data and brand clarity (more on that below).

       

      3) AI shopping is trying to eat the funnel (and your attribution model)

      SEJ reports that ChatGPT added native shopping, including a partnership with Walmart, positioning AI chat as a place where discovery → comparison → purchase can happen without traditional SERP hopping. Search Engine Journal

      What marketers should do next (starting this week)

         

          • Tighten your product data: structured data, consistent SKUs/GTINs where applicable, accurate availability/pricing, and clean landing pages. (If AI agents are selecting products, your data quality becomes your “ad creative.”) Search Engine Journal

          • Rebalance measurement: the piece calls out pressure to move beyond last-click thinking and optimize for incrementality as “prompt to purchase” compresses the journey. Search Engine Journal

        • Invest in brand demand: if users ask for brands by name inside AI interfaces, you want to be the brand they request—not the option the model “kind of” remembers. Search Engine Journal
         

        4) “AI misinformation” tests point to a blunt truth: details win… even when wrong

        SEJ digs into an Ahrefs experiment where a fictional brand was surrounded by conflicting narratives. The key insight for marketers: AI systems can overweight detailed third-party storytelling, especially when the “official” brand source is vague or non-committal. Search Engine Journal

        How to operationalize this

           

            • Build entity signals: consistent citations across reputable sites, clear “about” info, real-world proof, and trustworthy third-party mentions.

          • Don’t hide behind thin FAQs. If every answer is “we do not disclose,” you’re creating an information vacuum that other sources (good or bad) will fill. Search Engine Journal
           

          5) Paid media + platforms: small knobs that matter

          Microsoft Advertising: Microsoft Ads now supports custom columns in the UI (though some segmentation gaps remain, per early commentary). Search Engine Roundtable
          Why you care: better reporting ergonomics = faster optimization cycles, especially if you’re running multi-client or multi-market accounts.

          Chrome UI tests: Google is reportedly testing replacing a “Gemini” button with a more explicit “Browse with AI” label in Chrome. Search Engine Roundtable
          Why you care: if this expands, AI browsing behaviors could move from “feature” to “default habit,” affecting how users discover sources and how referrals behave.

           

          6) What the SEO community is feeling right now (fast pulse-check)

          On r/SEO, there’s the usual mix of “instant traffic spikes” and skepticism—especially around programmatic / scaled page builds and whether short-term wins will survive core update reality checks. Reddit

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