Core Updates: Understanding and Recovering from Google’s Broad Algorithm Changes

What a Core Update Is

Google explains it with an analogy: a list of your 20 favorite restaurants written years ago changes as new restaurants open and you reassess old ones, and “restaurants that move down aren’t necessarily ‘bad’; there are just other restaurants that make your top 20.” A drop after a core update can mean other pages now serve the query better, not that your page broke a rule. That’s the key difference from a manual action or a spam problem.

Step 1: Rule Out Other Causes

Before attributing a drop to a core update, check the causes that look similar:

The manual action path is covered in manual actions and reconsideration, and spam enforcement in spam updates.

Two older checks no longer apply. Search Console’s Mobile Usability report is gone: Google’s changelog for December 1, 2023 says it removed “mentions of the Mobile Friendly Test and the Mobile Usability report throughout our documentation, as they are going away.” And there are no separate helpful content updates to match against; the helpful content system “became part of our core ranking systems” in March 2024, per Google’s ranking systems guide.

Step 2: Confirm the Timing

From Google’s guide:

1. “Confirm that the core update has finished rolling out”, using the start and end dates on the Search Status Dashboard.
2. Wait “at least a full week after a core update completes before analyzing your site in Search Console.”
3. Compare that week “with a week before the core update started rolling out”.

Rollouts vary in length, so take the completion date from the dashboard rather than assuming a duration. Ongoing monitoring is covered in SERP volatility.

Step 3: Measure the Size and Shape

Google separates two cases. A small drop, its example being position 2 to 4, needs no drastic action: “in fact, we recommend avoiding making changes to content that’s already performing well”. A large drop, position 4 to 29 in its example, calls for “a deeper assessment.” Google also suggests analyzing search types separately.

Then look at the pattern:

These patterns point where to look; they don’t prove a cause.

Step 4: Assess the Content

For a sustained, large drop, Google recommends reading through its self-assessment questions “to check if your site overall (not just individual pages) is delivering content that’s helpful, reliable, and people first.” Its advice:

• “Take a close look at your site as a whole, and try to be objective”, and consider asking others unaffiliated with the site to assess it.
• “Evaluate the pages that were most impacted”, including whether “there may be other pages on the web that are doing a better job of helping the searcher.”

The self-assessment covers originality, completeness, expertise, presentation and whether content was made primarily for search engines; see the helpful content system and E-E-A-T explained. For review content, Google’s ranking systems guide describes a reviews system that aims to reward “content that provides insightful analysis and original research”; see the product reviews update.

Step 5: Make Changes That Help Readers

Google’s guidance on changes:

• “Avoid doing ‘quick fix’ changes (like removing some page element because you heard it was bad for SEO).”
• Improve content “in meaningful ways”, such as rewriting or restructuring so it’s easier to read and navigate.
• “Deleting content is a last resort,” for content that “can’t be salvaged.” If you’re considering deleting whole sections, Google says “that’s likely a sign those sections were created for search engines first”.

In practice, start with the pages that lost the most valuable traffic, compare them with the pages now ranking, and improve what readers need: accuracy, depth, first-hand experience, clear structure, and evidence of who wrote it. Thin pages are covered in thin content identification.

Recovery by Cause

Link problems specifically are covered in link spam updates.

How Long Recovery Takes

Google’s guide: “some changes can take effect in a few days, but it could take several months for our systems to learn and confirm that the site as a whole is now producing helpful, reliable, people-first content in the long term. If it’s been a few months and you still haven’t seen any effect, that could mean waiting until the next core update.” Recovery isn’t guaranteed: if other pages serve the query better, your page may not return to its old position without becoming better than them.

If You Gained

A gain after a core update is also a reassessment, not a permanent position. Note which pages and queries improved, keep them current, and apply what they do well to similar pages.

If a page dropped slightly, as in Google’s example of position 2 to 4, leave it alone; if it dropped sharply, as in 4 to 29, read it against the pages that now outrank it before changing anything.