The March 2026 core update, read honestly

Google’s March 2026 core update started on March 27 and finished rolling out on April 8. Twelve days, more volatile than the December one, and the pattern of winners and losers is now clear enough to talk about without guessing.

This is the version I’d give a client who called and asked why their traffic dropped.

Who got hit, in plain terms

The update is not subtle about what it favours. Sites that gained visibility share a few traits:

• They’re the actual source of whatever they’re talking about. Official sites, manufacturers, practitioners, the dentist’s own domain rather than a roundup of “best dentists in Mississauga.”
• They have some specialisation. Narrow, deep sites beat wide, shallow ones.
• They’ve been around. Established brands with history got a nudge up.

The sites that dropped share traits too:

• Aggregators, directories, comparison sites with no original data.
• Content farms that spun up a thousand AI-drafted pages in 2025.
• Thin affiliate pages where the “review” is clearly written by someone who has never touched the product.

If your traffic dropped and you fit the second list, the update did what it was supposed to do.

The AI content question

This is where people want a yes or no answer and there isn’t one.

Google has said, repeatedly, that they don’t care how content was produced. What they care about is whether the thing has value. That’s technically true, but it’s also slightly misleading, because in practice the penalty mostly lands on content that was obviously generated by a language model and published without an editor looking at it.

The pattern I’ve seen across client sites this month:

• Sites using AI as a typewriter — drafting a post, then having someone with actual experience rewrite, add specifics, add screenshots — fine. Some up, some flat.
• Sites using AI as a replacement for a writer — fluent, competent paragraphs with no specifics, no first-person details, no data — down, sometimes sharply.

The tell is always the same. AI-drafted content without editing reads smoothly but says nothing a reader couldn’t have inferred from the headline. Google has gotten better at spotting that. Readers got better at spotting that a while ago.

What to do if you moved

Google’s own advice is to wait a week after the rollout before making changes. That advice is correct and almost nobody follows it. If you were hit:

Don’t touch anything for a week. Daily traffic during a rollout is noisy. The actual post-update baseline needs a few clean days.

Audit your weakest pages, not your best. Sites get penalised in aggregate. A handful of thin pages can drag the whole site. Look for pages with no engagement, no backlinks, and no unique information. Either rewrite them with something specific or delete them.

Add things a language model can’t fake. Customer quotes with names. Actual photos. A specific price. A date. An opinion. A number from your own data. This is the entire game. Content that Google can’t find a duplicate of on another site is the content that holds up.

Check your technical baseline. A core update will amplify existing weaknesses. If your INP is in the red, if your LCP is over 3 seconds, if your site ships 400KB of JavaScript to a marketing page, those are now costing you more than they were in February.

The next core update is expected in June or July, so any real work you do now gets re-measured then. Don’t expect intra-cycle recovery.

The longer pattern

This update is consistent with where Google has been heading for two years. Weight is moving toward experience and specificity and away from optimisation. Pages that exist because someone had something specific to say do better. Pages that exist because someone wanted to rank for a keyword do worse.

The frustrating part for small business owners is that the second category is cheaper to produce. The honest answer is that it’s also cheaper to produce because it’s not worth very much, and the market is slowly pricing that in.

If your traffic dropped and you’re not sure which category you’re in, send us a note and we’ll give you an honest read.