--- title: "Best Sellers Report: Which SKUs Carry Your Volume? | byrd" description: See your best-selling products in seconds, without a CSV export. Analyze top sellers, demand concentration, and trends with byrdAI in Claude or ChatGPT. image: https://blog.getbyrd.com/hubfs/Top-Mover%20Report%20byrdAI.png --- [![Getbyrd](https://blog.getbyrd.com/hubfs/raw_assets/public/Getbyrd_May2021/images/Header_logo.svg "Getbyrd")](https://getbyrd.com/en) 12+ fulfillment centers in Europe - [Home](https://getbyrd.com/en) - Product - [Our Fulfillment Services](https://getbyrd.com/en/fulfillment) - [Switching 3PL](https://www.getbyrd.com/en/3pl-switch) - [Returns Portal](https://getbyrd.com/en/returns-portal) - [Dedicated Support](https://www.getbyrd.com/en/account-management) - Integrations - [Overview](https://www.getbyrd.com/en/all-integrations) - [Amazon](https://getbyrd.com/en/amazon-fulfillment) - [Billbee](https://getbyrd.com/en/billbee-fulfillment) - [ChannelEngine](https://getbyrd.com/en/integration-channelengine) - [eBay](https://www.getbyrd.com/en/ebay-fulfillment) - [Mirakl](https://www.getbyrd.com/en/mirakl-fulfillment) - [PlentyOne](https://getbyrd.com/en/plentymarkets-fulfillment) - [PrestaShop](https://getbyrd.com/en/integration-prestashop) - [Procuros](https://www.getbyrd.com/en/procuros-fulfillment) - [Shopify](https://getbyrd.com/en/shopify-fulfillment) - [Shopware](https://getbyrd.com/en/shopware-fulfillment) - [WooCommerce](https://getbyrd.com/en/woocommerce-fulfillment) - [Xentral](https://getbyrd.com/en/xentral-integration) - Solutions - [Baby Products](https://www.getbyrd.com/en/baby-products) - [Beauty, Health & Cosmetics](https://www.getbyrd.com/en/beauty-health) - [Electronics](https://www.getbyrd.com/en/electronics) - [Food, Beverages & Supplements](https://www.getbyrd.com/en/food-beverages) - [Jewelry, Accessories & Watches](https://www.getbyrd.com/en/jewelry-accessories) - [Pet Supplies](https://www.getbyrd.com/en/pet-supplies) - [Toys and Games](https://www.getbyrd.com/en/toys-fulfillment) - [For New Businesses](https://getbyrd.com/en/new-businesses) - [For Established Retailers](https://getbyrd.com/en/established-retailers) - [For Enterprises](https://getbyrd.com/en/enterprise) - [Pricing](https://getbyrd.com/en/pricing) - Fulfillment Center Network - [Fulfillment Center Europe](https://getbyrd.com/en/european-fulfillment-network) - [Austria](https://getbyrd.com/en/european-fulfillment-network/austria) - [France](https://getbyrd.com/en/european-fulfillment-network/france) - [Germany](https://getbyrd.com/en/european-fulfillment-network/germany) - [UK](https://getbyrd.com/en/european-fulfillment-network/uk) - Resources - [Blog](https://blog.getbyrd.com/en) - [Success Stories](https://getbyrd.com/en/references) - [Demo](https://www.getbyrd.com/en/fulfillment-software) - [Whitepaper: E-Commerce Slowdown](https://getbyrd.com/en/survive-and-thrive-ecommerce-whitepaper) - [E-Book: Sustainable Supply Chain](https://getbyrd.com/en/sustainable-e-commerce-supply-chain-e-book) - [E-Book: Cross-Border E-Commerce](https://getbyrd.com/en/cross-border-ecommerce-eu-ebook) - [Whitepaper: 7 Fulfillment Tips](https://getbyrd.com/en/7-fulfillment-tips-whitepaper) - About us - [Team](https://getbyrd.com/en/team) - [Career](https://getbyrd.com/en/jobs) - [Sustainability](https://getbyrd.com/en/sustainability-at-byrd) - [Partnerships](https://getbyrd.com/en/partnerships) - [Press](https://getbyrd.com/en/press) - [Login](https://app.getbyrd.com/en/login?_ga=2.175706018.1283541857.1621736684-626381589.1621482964) - [English](https://blog.getbyrd.com/en/best-sellers-top-movers-byrdai) - [Deutsch](https://blog.getbyrd.com/bestseller-analyse-top-mover-byrdai) - [English - United Kingdom](https://blog.getbyrd.com/en-gb/bestseller-analysis-top-movers-byrdai) - [Español](https://blog.getbyrd.com/es/productos-mas-vendidos-top-movers-byrdai) - [Français](https://blog.getbyrd.com/fr/meilleures-ventes-top-movers-byrdai) - [Italiano](https://blog.getbyrd.com/it/analisi-best-seller-top-mover-byrdai) [Request a quote](https://www.getbyrd.com/en#angebot-anfordern) # Best sellers: know your top-selling products, and protect them Your sales ranking live from your fulfillment data, not from gut feeling. [**Phillip Pitsch**](https://blog.getbyrd.com/en/author/phillip-pitsch) Published: July 28, 2026 Updated: August 03, 2026 ## Table of Content Ask a merchant for their three best sellers, and you get a quick answer. Ask about ranks four through fifteen, the share of total volume your top 10 carry, or which best seller is quietly losing steam, and the room often goes silent. That is exactly the gap the top movers report from [byrdAI](https://www.getbyrd.com/en/byrd-ai) fills: your sales ranking, live from your fulfillment data, in seconds instead of after a CSV export. ## **The problem: best sellers get celebrated, not managed** The ranking lives in your head. And your head is usually three months behind. Products rise and fall, promotions shift the picture, and season does the rest. Decisions about ad budget, purchasing, and warehouse space need the current ranking, not the one you feel is right. Concentration is invisible. When a single SKU sits in 12% of all orders (a real case from our demo data), that SKU is not a line in a list but a concentration risk. A stockout there hits every eighth order. Reports cost time exactly when you need them. The question "What were our top 10 last month?" tends to land at 4 p.m. on a Friday, right before the monthly meeting. Then the ritual begins: export, pivot, screenshot, slide. There is a more efficient, faster, and simpler way. **How to build the top mover report with byrdAI** Once you're connected, all it takes in Claude or ChatGPT is: "What were my 10 best-selling products last month?" byrdAI returns the ranking by shipping volume, with unit counts, order counts, and share of total volume. With the ready-made dashboard prompt from the [byrdAI page](https://www.getbyrd.com/en/byrd-ai) (and further down in this article), or any tweaks of your own, Claude turns that into a live dashboard: a best sellers leaderboard, demand concentration as a Pareto curve, the share of volume bundles pull, and a sortable table across your entire assortment. ![Top-Mover-Report byrdAi](https://blog.getbyrd.com/hs-fs/hubfs/Screenshot%202026-07-24%20at%2014.35.26.png?width=1143&height=937&name=Screenshot%202026-07-24%20at%2014.35.26.png) ## **![byrdAi Top-Mover-Report](https://blog.getbyrd.com/hs-fs/hubfs/Screenshot%202026-07-24%20at%2014.35.40.png?width=763&height=394&name=Screenshot%202026-07-24%20at%2014.35.40.png)** The report splits your assortment into four demand tiers: best sellers (the SKUs that together carry half your volume), strong products, a solid middle, and the long tail. So you see not just who leads, but how steeply your assortment falls off. ## **The decisions you draw from it** Protect your best sellers from stockouts. Your top products deserve the strictest inventory monitoring. Combine the ranking with the [reorder planner](https://blog.getbyrd.com/en/reorder-point-planning-byrdai?hsLang=en): "How many days of cover do my top 10 have?" is perhaps the single most valuable question in this whole setup. Align ad budget with reality. Is your advertising running for the products that actually pull volume? Comparing the top movers list against your campaign budget regularly surfaces expensive mismatches. Manage concentration risk on purpose. High concentration is not bad; it is only risky when you don't know about it. Once you know three SKUs carry half the business, you secure suppliers, stock, and alternatives exactly there. Use bundles deliberately. The report shows what share of your volume bundles account for. If they pull well, they are your best lever for pairing slow movers with proven performers. **Expert tip:** The ranking is based on units shipped, not revenue. That is intentional: for fulfillment decisions (warehouse space, safety stock, count cadence), volume is what matters. For assortment decisions, put your margins next to it, because a high-volume item with a thin margin deserves different handling than a margin star.   ## From report to routine: know your bestsellers **The monthly report that writes itself.** "Create my top 15 from last month versus the month before and send the summary to the management update in Slack." The Friday-4-p.m. ritual disappears entirely. **The trend watcher.** "Compare my top movers with last month and flag products that are clearly accelerating or slowing down." You spot the risers before they sell out, and the fallers before they turn into overstock. **The peak-season check.** Before Q4: "Show me the top movers from last year's Q4 and compare their current cover with the demand back then." The purchasing list for peak almost writes itself. **The presentation shortcut.** "Format the top 10 as a table for my monthly presentation, with the change versus last month as an arrow." Paste it straight in, done. ## **Your ranking is already waiting** As a byrd customer, you connect byrdAI to Claude or ChatGPT in about 5 minutes and copy the top movers prompt from our [byrdAI page](https://www.getbyrd.com/en/byrd-ai) or below this section. Not a byrd customer yet? byrdAI is only available with byrd fulfillment, as the first European 3PL with an MCP server. [Talk to us](https://www.getbyrd.com/en/byrd-ai#byrdai-cta). ### **Example prompt for the top movers report (adjust it however you like).** Build a live, persisted HTML dashboard artifact that shows which of my products moved the most units, pulling fresh data from byrd every time it opens. Single self-contained HTML file, light mode only. ## Data source - Tool: report\_top\_movers (byrd MCP), called with { date\_from, date\_to } for a rolling window: Last quarter (trailing 90 days, default) / 6 months / 12 months. Cache per window. - Row fields: product\_name, sku, product\_type, units\_shipped, shipment\_count, avg\_daily\_units. One row per product; only SKUs that shipped in the window (no zero-movers). Ranking is by units, not revenue. - Merchandise only: singles = product\_type "product" or "prepacked\_product", bundles = "bundle"; exclude packaging/branding/alias types. - Classify each SKU into cumulative-share demand bands computed over the filtered universe (product-type filter + hide-test applied): Bestseller = top SKUs up to 50% of total units, Strong = 50-80%, Steady = 80-95%, Long tail = last 5%. The demand-band and min-units controls act as drill filters on top: KPIs, Pareto and mix stay at universe level while the leaderboard and table respond. ## Tech & style - Chart.js v4 and Grid.js v5 from the allowed CDN, no other libraries, system font stack. - Accent turquoise #62C2AF (#2F7A68 for links), text #293141, secondary #4E5664, borders #E5EAEE, page #FAFAFA, cards #fff. - Demand-band colours: Bestseller dark green #2F7A68, Strong turquoise #62C2AF, Steady amber #F2A03D, Long tail grey #9CA0A8. ## Layout (top to bottom) 1. Header: eyebrow "Demand & sales - bestsellers & fast movers", H1 "Which products moved the most units?", turquoise accent rule, subtitle with the window's date range + "ranked by units shipped" + last-updated time. No logo. 2. Controls card: period buttons Last quarter / 6 months / 12 months (re-fetches); product-type buttons All / Singles / Bundles; demand-band buttons All / Bestsellers / Strong / Steady / Long tail; min-units select; "Hide test SKUs" checkbox. 3. Four KPI cards: Units shipped (total + per day), Products shipped (count + avg units each), Top seller (units + name + share of volume), Top-10 concentration (% of units from 10 SKUs). 4. Hero panel "Bestseller leaderboard": horizontal bars of the top 15 by units shipped, coloured by demand band, with unit labels drawn at the end of each bar (reserve right padding so labels never clip; small custom plugin). 5. Two panels side by side: "Demand concentration" Pareto combo chart (per-SKU share bars + cumulative-share line on a right 0-100% axis, dashed guide at 80% with dynamic sub-text "top N of M SKUs = 80% of volume") and a singles-vs-bundles doughnut with the bundle share rendered in the centre hole (custom plugin). 6. Recommended actions: protect bestsellers from stockouts (name the top SKUs), comment on concentration risk (high/balanced), highlight bundles pulling volume (or basket depth if no bundles), and the broadest-reach product (most orders). Data-driven with impact numbers. 7. Grid.js table (sortable, searchable, 12 rows/page) sorted by units desc: SKU (hover copy button + open-in-byrd link to https://app.getbyrd.com/inventory/products/all?q=&fields=sku), Product, Demand-band badge, Units as an inline mini-bar + number, Share %, Orders, Units/order. Give Grid.js columns with HTML headers an explicit id. Above: "Showing N products" + "Copy N SKUs" button. 8. Footer explaining: ranked by units shipped (shipment prices aren't reliable enough for revenue ranking); demand bands are cumulative-share buckets over the filtered universe; only SKUs with at least one shipment in the window appear. ## Details - Thousands separators; shares with 1 decimal ("22.8%"); units/order with 1 decimal. Escape all dynamic HTML. - Custom positioned tooltip div driven by data-tip attributes (native tooltips don't work in the sandbox). - Handle a missing connector gracefully; show loading and error states. Finish by verifying the rows load, the leaderboard / Pareto / doughnut render, and there are no console errors. ## **Frequently asked questions about the top mover report with byrdAI** **What's the difference from an ABC analysis?** The top movers report is a ranking: who sells how much, how concentrated demand is, who's rising and falling. The [ABC analysis](https://blog.getbyrd.com/en/abc-analysis-byrd-ai?hsLang=en) classifies your entire assortment and derives storage and ordering rules per class from it. A ranking for the quick look, a classification for the policy. **Which time frame does it cover?** By default, the last 90 days. Via prompt you choose freely: last month, last quarter, 12 months, or a comparison of two periods. **Does the report count revenue or units?** Units shipped. 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