What happened to justinwelsh.me?

Justin Welsh is a sharp operator. So this is not a hit piece. It is a warning about the ground everyone builds on, told through the numbers.

Between 2021 and 2025, justinwelsh.me grew its organic search traffic about 480 times. The engine behind that growth was a programmatic glossary: hundreds of "what is X" definition pages, each one tuned to catch a search. It worked, right up until it did not.

The cliff

Traffic plateaued through 2025 at roughly 8,600 to 11,500 visits a month. Then Google's December 2025 and March 2026 core updates landed, both aimed squarely at scaled content. The fall was steep and steady: from about 8,685 visits in December 2025 to 740 in June 2026. That is close to a 94% drop in six months.

Here is the tell. The keyword count did not collapse. It peaked at 9,179 in January 2026, the same month traffic started falling off a cliff. The pages were still indexed. They had simply been demoted off page one, where the clicks live.

The response

Welsh did the rational thing. He deleted the entire glossary. Every /glossary/ URL returns a 404 today, and the site's navigation was trimmed right back. Then he leaned on the asset Google cannot switch off: a newsletter audience of more than 230,000 readers.

The lesson

This is the whole point, and it is not new, but the data makes it hard to argue with:

Rented traffic gets recalled. Owned audience compounds.

Search demand is borrowed. An algorithm gives it and an algorithm takes it away, on its own schedule, without warning. An email list, a community, a base of people who know your name: that is yours. It survives core updates.

We pulled the full Semrush series, checked the live site and the Wayback Machine, and wrote the full post-mortem, charts and all.

And if the lesson has you rebuilding around conversion instead of volume, the follow-up is here: our guide to conversion rate optimization tools, sorted by job, budget, and traffic level.

Want the rebuild playbook instead of just the autopsy? All of it is in 50 search optimization tips for 2026: how to rank without the thin-page pattern that got recalled here, and how to check the page converts once it does.

And the counter-play to the glossary that died here, the keywords that actually carry buy intent, is mapped in bottom of funnel keywords.