# Understanding BSR BSR — Best Sellers Rank — is one of the numbers you'll look at constantly when analysing products. It's Amazon's way of ranking every product by how well it sells within its category. Understanding it properly helps you make better buying decisions and avoid sitting on slow moving stock. *** **The basics** Every product on Amazon has a BSR. The lower the number, the faster the product is selling. A toy with a BSR of 500 is selling a lot faster than a toy with a BSR of 50,000. Simple enough. What catches people out is assuming that a good BSR in one category means the same thing in another — it doesn't. BSR is also updated hourly based on recent and historical sales data. A sudden spike in sales can cause a BSR to drop dramatically overnight. Equally, a product that stops selling will see its BSR climb quickly. This means a single BSR snapshot doesn't tell you much — you need to look at how it's moved over time. *** **What counts as a good BSR?** There's no universal answer but here are some general starting points: * **Toys & Games** — under 50,000 usually indicates steady sales * **Health & Beauty** — under 20,000 is generally a solid range * **Electronics** — harder to generalise due to the niche nature of the category, products can still sell well with higher BSRs These are guidelines not rules. Always cross reference BSR with the estimated sales figure in SAS rather than relying on BSR alone. *** **Things that can mislead you** **Seasonal spikes** — a product might have an excellent BSR in December and a terrible one in February. Always check the BSR history over at least three to six months before buying. A great BSR today means nothing if the product tanks for eight months of the year. **Temporary promotions** — a seller running a heavily discounted promotion can temporarily tank their BSR, making the product look like it sells faster than it normally does. Check Keepa to see if there's a corresponding price drop alongside the BSR movement. **Category differences** — a BSR of 5,000 in Grocery represents very different sales volume to a BSR of 5,000 in Industrial & Scientific. Learn the categories you source in and develop a feel for what BSR ranges actually mean in each one. *** **How to use BSR properly** BSR is one data point among several — not the deciding factor on its own. Use it alongside: * Estimated monthly sales from SAS * ROI and profit margins * Buy Box stability over time * Competition levels on the listing A product with a great BSR but terrible margins, a suppressed Buy Box, and ten FBA sellers already on it isn't a good buy. A product with a modest BSR, strong margins, stable pricing history, and low competition might be excellent. BSR tells you something is selling. Everything else tells you whether you should be the one selling it. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://behind-the-buybox.gitbook.io/behind-the-buybox-docs/understanding-bsr.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.