SEO & Core Web Vitals: Key Updates for 2026

Explore 2026 SEO insights: LLM-driven conversions, AI keyword research, Google Ads delays, and new web platform features shaping the landscape.

SEO & Core Web Vitals: Key Updates for 2026

SEO & Core Web Vitals: Updates for 2026-05-01

Ecommerce SEO and web performance teams face critical updates today, spanning AI-driven conversions, keyword research innovation, ad approval delays, and fresh web platform features. Here’s what’s shaping the landscape on May 1, 2026.

LLMs and Conversions: ChatGPT, Perplexity, and Gemini Compared

An expert panel at Search Engine Journal compared leading large language models (LLMs) like ChatGPT, Perplexity, and Gemini to assess their role in driving conversions. The findings suggest differences in how these tools handle user intent, brand mentions, and actionable outputs. Gemini reportedly showed an edge in generating brand-specific visibility, supported by a Moz experiment analyzing prompts for brand bias [1][5].

What this means for your stack: Evaluate which LLM aligns best with your conversion goals, particularly if brand visibility is a priority.

AI-Powered Keyword Research: Opportunities and Risks

Ahrefs explored how AI can enhance keyword research when integrated with reliable SEO data. While standalone chatbots may risk generating inaccurate insights, combining AI with verified datasets can unlock actionable opportunities. The blog also shared prompts to help teams kickstart AI-driven keyword strategies [2].

What this means for your stack: Pair AI tools with trusted SEO data to reduce misinformation and improve research efficiency.

Google Ads: Demand Gen Image Ads Approval Delays

Google Ads Liaison Ginny Marvin confirmed delays in the approval of Demand Gen Image ads. These delays, which can sometimes stretch for days, may disrupt campaign timelines, especially for time-sensitive promotions [3].

What this means for your stack: Build buffer time into your ad campaign plans to account for potential approval delays.

New Web Platform Features: March 2026 Highlights

Recent web platform updates include features aimed at improving performance and developer productivity. Chrome Developers announced a new course on AI evaluations, set to roll out soon, while web.dev highlighted stable and beta browser enhancements from March 2026 [4][6].

What this means for your stack: Stay informed about browser capabilities and AI evaluation techniques to maintain a competitive edge in performance optimization.

Sources

  • [1] Search Engine Journal — ChatGPT vs. Perplexity vs. Gemini: Which LLMs Are Driving Real Conversions? Expert Panel
  • [2] Ahrefs Blog — AI Keyword Research: How It Works and 9 Prompts to Start

    • (https://ahrefs.com/blog/ai-keyword-research/)

  • [3] Search Engine Roundtable — Google Ads Confirms Demand Gen Image Ads Approval Delays

    • (https://www.seroundtable.com/google-ads-demand-gen-image-ads-approval-delays-41216.html)

  • [4] Chrome Developers — Take our course about AI evaluations

    • (https://developer.chrome.com/blog/announce-ai-evals-course?hl=en)

  • [5] Moz Blog — Brand Bias in Prompts: An Experiment

    • (https://moz.com/blog/brand-bias-in-llm-prompts)

  • [6] web.dev — New to the web platform in March

    • (https://web.dev/blog/web-platform-03-2026?hl=en)

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    Authored by the ControlVitals Editorial Team — performance and SEO practitioners auditing real production sites every day.

    Editorial transparency: this article was researched and drafted with AI assistance, then reviewed by our editorial team for factual accuracy before publication.