Review Management

What Is Aggregate Rating?

A combined average rating calculated from all individual customer reviews, displayed as a single score with review count.

An aggregate rating is the average score calculated from all individual customer reviews for a product, service, or business. It is typically displayed as a composite number (e.g., 4.7 out of 5) alongside the total number of reviews that contribute to that score.

How Aggregate Ratings Are Calculated

The most common method is a simple arithmetic mean:

Aggregate Rating = Sum of all ratings ÷ Number of ratings

However, some platforms use weighted calculations:

  • Recency weighting — More recent reviews carry more weight
  • Verified purchase weighting — Verified buyers' reviews count more
  • Bayesian averaging — Accounts for review volume (prevents a single 5-star review from showing as "5.0")

    • Display Standards

    Google's structured data guidelines for AggregateRating require:
  • ratingValue — The average rating (e.g., 4.7)
  • ratingCount — Total number of ratings
  • bestRating — Maximum possible rating (typically 5)
  • worstRating — Minimum possible rating (typically 1)

    • The Sweet Spot

    Research shows that the optimal aggregate rating for maximizing conversions is between 4.2 and 4.7:
  • Below 4.0: Significant conversion drop-off
  • 4.2–4.5: Highest purchase likelihood (perceived as honest and trustworthy)
  • 4.8–4.9: Slightly lower trust (perceived as "too good")
  • 5.0: Lowest trust among high ratings (perceived as potentially fake)

    • Aggregate Ratings and SEO

    Implementing AggregateRating schema markup enables star ratings in Google search results. This is one of the most impactful SEO tactics for review-rich businesses, with documented CTR increases of 20-35%.

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    Related Terms

    Star Rating

    A 1-to-5 scale visual rating system using star icons to represent customer satisfaction levels.

    Rich Snippet

    Enhanced search result listings that display additional information like star ratings, prices, or FAQs directly in Google.

    JSON-LD Review Markup

    Structured data format using JSON-LD to describe reviews and ratings so search engines display rich snippets.

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