SR

Sales Rank is one of Amazon's most visible and commonly referenced performance metrics. It reflects a product's recent and historical sales velocity, updated frequently throughout the day.

SR is also known as Best Sellers Rank (BSR) and appears on every product detail page under the "Product Information" section.

How It Works:

• SR is dynamic, updating based on real-time sales activity.
• A product with SR 1 is the top-selling item in its category.
• SR is calculated per category and subcategory.
• It is influenced primarily by the number of recent sales, but historical performance also matters.

Key Characteristics:

• Category specific: Each ASIN has multiple SRs, one for each category where it is listed.
• Non-linear scale: The difference between SR 1 and SR 10 is significant, while between SR 20,000 and 21,000 it is minimal.
• Not a revenue indicator: SR reflects unit sales, not profit or margin.

What Influences SR:

• Recent sales velocity (strongest factor).
• Historical sales consistency.
• Price changes and promotions.
• Stock availability.
• Lightning Deals, coupons, and advertising impact.

How Vendors and Sellers Use SR:

• Product validation: Identify top-selling items in a category.
• Competitor analysis: Understand market position relative to similar products.
• Demand forecasting: Estimate potential sales based on BSR ranges.
• Launch strategy: Track early momentum for new ASINs.
• Advertising planning: Identify which ASINs need visibility boosts.

Example:
An ASIN with SR 350 in Kitchen is performing very well and selling steadily.
If the SR suddenly drops to 180, it means the product's recent sales increased significantly, often due to advertising or discounts.

Why It Matters:
SR is a key metric for understanding market competitiveness, sales momentum, and category performance.
While it is not a perfect measure of revenue, it offers a quick snapshot of how well a product sells compared to others in its category.

In short:
SR (Sales Rank) is Amazon's ranking of a product based on its sales performance within a category. A lower number means better sales and stronger demand.