# Share of Search

Share of Search is a marketing metric that measures the percentage of all search queries for a product category that include a specific brand name. It is calculated by dividing the volume of searches for a specific brand by the total search volume for all brands in that category. For example, if searches for "Nike running shoes," "Adidas running shoes," and "New Balance running shoes" total 100,000 per month, and "Nike running shoes" accounts for 40,000 of those, Nike's share of search is 40%. The power of Share of Search lies in its predictive quality. It is considered a leading indicator of market share. If a brand's Share of Search is increasing, it often signals growing consumer demand and intent, which typically translates into increased market share in the future. Conversely, a declining Share of Search can be an early warning sign of waning brand relevance. It provides a real-time, cost-effective way to gauge brand health and campaign effectiveness between traditional market share reports, which are often delayed.

## Additional resources: 

[Share of Search by 42Signals](https://www.42signals.com/share-of-search/)
[How to Calculate Share of Search](https://www.42signals.com/blog/how-to-calculate-and-utilize-share-of-search-for-your-brand/)

**What is share of search?** Share of search is the percentage of all category search queries that include your brand, used as a leading indicator of market share. If it's rising, demand is usually growing; if it's falling, it can be an early warning that brand relevance is slipping.

 

**Is share of search a good predictor of market share?** Yes, share of search is widely used as a leading indicator of future market share, often shifting before sales data does. It offers a fast, low-cost read on brand health between slower, traditional market-share reports.

 

**How is marketplace share of search different from Google share of search?** Google share of search measures brand query volume in a search engine. Marketplace share of search measures how often your products appear in the top results within a marketplace like Amazon or Flipkart, the version that directly affects whether shoppers discover and buy your products.