Guides to find what sells and grow it
Practical methods for product research, competitor ads, store teardowns and growth, with the data to back each step.
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How to validate a winning product before you spend on ads
A product idea is a guess until the market backs it. Check the four signals and the margin, then decide whether it earns an ad test.
Product researchHow to find trending products for Black Friday and the holidays
Holiday winners are found months before November. A timeline, the signals to watch as the season builds, gift-friendly product traits and offers that protect your margin.
Product researchHow to find your target audience by studying competitors
Your competitors have already paid to learn who buys. Read their ads, landing pages and emails, and turn what you find into a one-page audience profile you can test.
Ad insightsGoogle Ads vs Meta ads for e-commerce: where to start
Google reaches people who are already searching. Meta shows your product to people who did not know it existed. How to pick your first channel and when to add the second.
Ad insightsHow to analyze your competitors' Google ads
What to look at in a competitor's Google ads, a step-by-step audit with a simple scorecard, and how to tell what is worth borrowing from what to leave alone.
Ad insightsHow to research competitors' Meta ads, step by step
A practical method for studying a competitor's Facebook and Instagram ads, from finding all of them to building a swipe file and following the brand day by day.
GrowthHow to improve ROAS: the levers that move it
Find the ROAS you need to break even, then work through the levers that change it, from creative and offer to order value, audience and retention.
GrowthHow to build a TikTok strategy for an e-commerce brand
How to run organic content and ads on TikTok as one system, which formats and hooks suit the feed, how to work with creators, and how to test at a pace you can keep.
GrowthThe email flows Shopify brands rely on, and how to study them
The five automated email flows most Shopify stores run, what to put in each one, and how to study the flows and campaigns of the brands in your niche.
Shopify toolsHow to analyze any Shopify store: traffic, apps, theme, best sellers
A step-by-step checklist for tearing down any Shopify store, what each signal tells you and what it doesn't, and how to run the whole teardown in a few minutes.
Shopify toolsHow to use an AI agent for e-commerce research with MCP
MCP in plain words, how to connect an AI agent to the SellWinners MCP server, prompts that work for product, ad and store research, and how tool calls use your credits.
Shopify toolsProfit margin and break-even ROAS for a Shopify product, explained
How gross, contribution and net margin differ, which costs to count on every order, and a fully worked example that ends with your break-even ROAS and CPA.
See what's winning in your market
Search Shopify stores and Meta ads for free. The Free plan includes the web app and the MCP server (150 credits a month), without the API. Paid plans add every dataset and the API, with more credits.