Clear definitions and practical guides for every term you'll encounter as an e-commerce seller.
Amazon BSR is a numerical ranking that shows how well a product sells relative to others in its category. A lower BSR means higher sales volume.
Read full guide →An ASIN is a unique 10-character alphanumeric code that Amazon assigns to every product in its catalog. It's used to identify and look up specific products.
Read full guide →FBA (Fulfillment by Amazon) is a service where Amazon stores your products, picks, packs, and ships orders to customers, and handles customer service and returns.
Read full guide →MOQ is the smallest number of units a supplier will produce or sell in a single order. It's a key factor in calculating startup costs for physical product businesses.
Read full guide →ACOS (Advertising Cost of Sales) is the percentage of ad spend relative to attributed sales revenue. An ACOS of 25% means you spent $25 in ads to generate $100 in sales.
Read full guide →COGS is the total direct cost of producing or acquiring the products you sell. It includes manufacturing, materials, and freight — but not marketing, rent, or salaries.
Read full guide →Private label is a business model where you source generic products from manufacturers and sell them under your own brand name with custom packaging, logos, and modifications.
Read full guide →White label products are pre-made generic goods that multiple sellers rebrand and sell as their own. Unlike private label, there's no product customization — just branding.
Read full guide →Dropshipping is a fulfillment model where you sell products without holding inventory. When a customer orders, you purchase from a supplier who ships directly to the customer.
Read full guide →Product research is the process of identifying profitable products to sell online by analyzing demand, competition, margins, trends, and sourcing costs before investing in inventory.
Read full guide →Google Trends is a free tool by Google that shows search interest over time for any keyword. Sellers use it to identify seasonal patterns, compare product demand, and spot rising trends.
Read full guide →TikTok Shop is an e-commerce feature within TikTok that lets creators and sellers list products directly in videos, livestreams, and a dedicated shopping tab.
Read full guide →Amazon PPC is Amazon's advertising system where sellers bid on keywords to show sponsored product listings in search results. You pay only when a shopper clicks your ad.
Read full guide →Profit margin is the percentage of revenue that remains as profit after subtracting all costs. For e-commerce, this includes product cost, platform fees, shipping, and advertising.
Read full guide →Keyword research is the process of finding the search terms customers use to find products. Optimizing your listing for the right keywords increases visibility and sales.
Read full guide →An Amazon sales estimator converts a product's Best Seller Rank (BSR) and category into estimated daily and monthly unit sales, helping sellers gauge demand before entering a niche.
Read full guide →An FBA calculator estimates your profit per unit by subtracting Amazon fees (referral, fulfillment, storage), product costs, shipping, and advertising from your selling price.
Read full guide →Amazon FBA fees include a referral fee (8-20% of selling price), a fulfillment fee ($3-$10+ per unit based on size/weight), and monthly storage fees ($0.87-$2.40 per cubic foot).
Read full guide →An ACOS calculator computes your Advertising Cost of Sales, ROAS, TACoS, and break-even ACOS to determine whether your Amazon PPC campaigns are profitable.
Read full guide →An MOQ budget planner calculates the total investment needed to launch a product — including inventory costs at the supplier's minimum order quantity, plus all one-time launch expenses.
Read full guide →A TikTok Shop profit calculator estimates your real per-unit profit after all costs — referral fees, affiliate commissions, FBT fulfillment, ad spend, returns, and sample seeding.
Read full guide →A commission optimizer helps TikTok Shop sellers find the ideal affiliate commission rate — high enough to attract creators, low enough to protect margins — with category benchmarks.
Read full guide →A sample seeding ROI calculator estimates the return on investment of sending free product samples to TikTok creators — factoring in costs, conversion rates, and expected sales.
Read full guide →A marketplace fee comparison tool shows your per-unit profit across Amazon FBA, TikTok Shop, Walmart, Shopify, eBay, and Etsy side-by-side — helping multi-channel sellers find the most profitable platform.
Read full guide →AstroMarket uses AI to analyze all these metrics automatically — BSR, keywords, competition, trends, and sourcing in one report.
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