Semantic HTML still matters with Jono Alderson

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October 9th, 2025

26 mins 52 secs

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About this Episode

Jono Alderson joins the podcast to discuss why semantic HTML still matters today. He shares how thoughtful markup can improve accessibility and performance, from using the picture tag and responsive images to optimizing with content-visibility CSS. The conversation dives into common pitfalls like div soup, the shift toward more template-centric design, and techniques for improving the critical rendering path. Jono also discusses preloading, HTTP early hints, and the evolving role of structured data, LLMs, and Google’s trust signals in shaping a more meaningful and efficient web.

Links

Website: https://www.jonoalderson.com
X: https://x.com/jonoalderson
BlueSky: https://bsky.app/profile/jono.id
LinkedIn: https://www.linkedin.com/in/jonoalderson

Resources

Why semantic HTML still matters: https://www.jonoalderson.com/conjecture/why-semantic-html-still-matters/

Chapters

00:40 Meet Jono Alderson: SEO Consultant and Web Performance Expert
02:00 Why Semantic HTML Still Matters in 2025
05:00 Accessibility, Performance, and the 15% Market Opportunity
08:00 The Cost of Div Soup and Framework Abstraction
10:30 Finding Balance: Developer Experience vs User Experience
13:00 Template-Centric Thinking vs Component-Centric Development
16:00 What Is a Page? Rethinking How the Web Works
18:30 Structured Data, Schema.org, and Google’s Trust Signals
21:00 Quick Round: Picture Tag, Content Visibility, and Performance
23:30 The Worst HTML Anti-Patterns Developers Still Use
25:00 Will LLMs Reward Good Markup or Ignore It?
26:00 Where to Find Jono Alderson and Closing Thoughts

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