71% of Tracked Affiliate Sites Hit by March 2026 Update

Google's March 2026 core update hit 71% of tracked affiliate and comparison sites with significant traffic losses. The update enforced Information Gain scoring — rewarding content that adds genuinely new information — and escalated Scaled Content Abuse enforcement. The pattern is clear: template-based content with data swapped in is no longer viable. Sites with proprietary data, original testing, and interactive tools survived. Thin comparison listicles and AI-generated content dumps did not.

What Google changed

The March 2026 update combined two major enforcement mechanisms:

Information Gain scoring

Information Gain measures whether a page adds genuinely new information to the corpus of existing content on a topic. If your page says the same things as the other 50 pages ranking for the same query — just reworded — Information Gain assigns it a low score. This directly penalises content that exists solely to rank rather than to inform.

Scaled Content Abuse enforcement

Scaled Content Abuse now covers any content produced at scale — whether by AI or by human templating — that does not add substantive value. This is not limited to AI-generated text. It includes human-written content produced by swapping data into templates, which describes the majority of affiliate comparison content on the web.

What died

Content type	Why it was hit	Example
Thin comparison listicles	No original evaluation, just aggregated feature lists	"10 Best CRM Tools 2026" with copied feature descriptions
AI-generated content dumps	Zero Information Gain — rephrased existing content at scale	Hundreds of city-specific pages with identical structures
Template + data swap	Same template with different data points inserted	"Best [X] in [City]" pages with only the city name changed
Affiliate review sites without testing	Reviews based on marketing materials, not hands-on use	"Full review of [Product]" based entirely on the product's website
Programmatic SEO at scale	Thousands of pages from a database with minimal editorial value	Auto-generated pages for every postcode/product combination

What survived

The 29% of affiliate sites that maintained or grew traffic share common characteristics:

• Proprietary data — original research, surveys, or testing data that cannot be found elsewhere
• Hands-on testing — genuine product reviews with screenshots, video evidence, and specific findings
• Interactive tools — calculators, comparison generators, and assessment tools that provide personalised value
• Expert attribution — named authors with verifiable expertise and Person schema
• Unique methodology — documented evaluation frameworks with transparent scoring criteria

Lessons for comparison sites

The comparison site model is not dead — but the low-effort version of it is. Comparison sites that survive in the post-March 2026 environment need proprietary evaluation methodologies, original data, named expert reviewers, and interactive tools. The bar has been raised from "aggregate and present" to "test, evaluate, and add genuine insight."

For any site in the comparison or review space (including this one), the survival checklist is:

1. Document your methodology — how do you evaluate? What criteria? How is scoring determined?
2. Generate proprietary data — run your own tests, surveys, or audits
3. Name your reviewers — attribute content to real people with verifiable expertise
4. Add interactive elements — tools that provide personalised value beyond static content
5. Update regularly — stale comparison content signals low editorial commitment
6. Show your working — screenshots, data tables, test results that prove original evaluation

The AI search connection

Sites hit by the March 2026 update will see compounding losses as AI search grows. AI platforms prefer to cite authoritative, original sources — exactly the kind of content that survived the update. The sites that lost Google traffic are also the sites least likely to be cited by ChatGPT, Gemini, or Perplexity. The update and the AI search shift reinforce the same message: original, expert, evidence-based content is the only viable long-term strategy.

See all AI search statistics · See our evaluation methodology