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Selling on Marketplaces

How to use Amazon, Etsy, eBay, POD and app marketplaces for built-in buyers — plus marketplace SEO, fee and policy risk, and building your brand off-platform.

Marketplaces are shopping malls with the foot traffic already built in. Instead of waiting months for SEO, you list where buyers are already searching. The trade-off: you pay fees, you follow their rules, and you don’t own the customer relationship. Used wisely, marketplaces are a fast way to validate products and get your first sales.

The main marketplace types

Amazon

The biggest product search engine for many categories. Suits physical products, private label, books and some POD. Competitive, rule-heavy and fee-heavy — but the demand is enormous.

Etsy

Handmade, vintage, craft supplies and creative goods — including digital downloads like printables, templates and planners, plus POD items where you contribute the design.

eBay

Great for resale, collectibles, refurbished and niche parts. Useful for testing demand and moving inventory, with both auction and fixed-price listings.

POD marketplaces

Platforms like Redbubble, Teepublic, Spreadshirt and Amazon’s Merch on Demand let you upload designs; they handle printing, shipping and customer service. Low effort per sale, low control.

Digital product platforms

Gumroad and Lemon Squeezy make it easy to sell ebooks, templates, courses and software, with some discovery features and simple checkout.

App and template marketplaces

The Shopify App Store, Chrome Web Store, WordPress.org plugin directory, Notion and Canva template galleries — distribution for micro-SaaS and no-code tools.

Pro tip: Match the marketplace to your asset model. POD stores often start on Etsy or POD marketplaces (see ecommerce and POD). Micro-SaaS builders look at app stores (see micro-SaaS). Digital products fit Gumroad and Etsy (see digital products).

Marketplace SEO: how to get found

Every marketplace has its own search engine. The principles are similar everywhere: match buyer language, convert well, and keep customers happy.

  1. Research buyer keywords. Use the marketplace’s own search autocomplete. Note the words buyers use — often different from what sellers say.
  2. Write clear, keyword-aware titles. Lead with what the item is and who it’s for. Avoid stuffing; readability affects clicks.
  3. Use every field. Tags, categories, attributes, and descriptions all feed search. Blank fields are missed chances.
  4. Win the click with images. Clean main image, lifestyle shots, size or scale references, and (where allowed) short video.
  5. Win the sale with details. Answer the common questions in the description: size, materials, delivery, what’s included, file formats.
  6. Earn reviews honestly. Great products and service lead to reviews. Never buy reviews or offer incentives the platform forbids.
AI Prompt

I sell [product] on [Etsy / Amazon / eBay / Gumroad] for [audience].
Here are the top-selling competitor titles I found: [paste 5 titles].
1. List the buyer keywords and phrases that keep appearing.
2. Write 5 title options that follow [marketplace]'s style and are easy to read.
3. Suggest 13 tags or search terms (if the platform uses tags).
4. Write a product description that answers the top 8 buyer questions.
Do not use any trademarked brand names that I don't own.

Fees and policy risk

Marketplace economics vary widely by platform, category and country, and fees change. Typical cost types include:

Cost type What it is Where you’ll see it
Listing fees A charge to publish or renew a listing Some marketplaces (e.g. Etsy)
Transaction / referral fees A percentage of each sale Most marketplaces
Payment processing Card processing charges Most marketplaces
Fulfillment fees Storage, picking, packing and shipping Fulfillment programs such as FBA
Advertising Paid placements inside the marketplace Most large marketplaces
Subscription Monthly seller or developer plans Some marketplaces and app stores

Always check each platform’s current fee pages before you price anything. Run your numbers through the Margin Calculator so fees don’t quietly eat your margin.

Heads up: Marketplaces can suspend listings or accounts for policy violations — sometimes with little warning. Read the seller policies, keep records, and never rely on a single marketplace for all your sales.
Trademark caution: Using brand names, logos, characters, sports teams or celebrity names in your designs or listings is a fast way to get taken down — and can create legal liability. Create original designs and original product names.

Build your brand off-platform

Marketplace customers belong to the marketplace. Your long-term job is to turn some of that attention into a brand you own.

  • Register your own domain and build a simple brand site (WordPress or Shopify)
  • Use a consistent brand name, logo and style across every listing
  • Offer genuinely useful free content on your site: guides, size charts, how-tos
  • Build an email list through your own site — see newsletters for niches
  • Follow each marketplace’s rules about contacting buyers and linking off-platform
  • Grow Pinterest, video and social channels that point to your own site
  • Consider a direct store once you know what sells

Choosing your first marketplace

If you’re just starting, pick one marketplace and learn it well. Use this quick guide to narrow it down.

If you sell… Start by looking at… Watch out for…
Original designs on apparel, mugs and prints Etsy (with a POD integration) or POD marketplaces Trademark rules, saturated generic designs
Printables, planners and templates Etsy, Gumroad, Canva or Notion template galleries Copycat listings, clear licensing terms
Physical products you source Amazon, eBay, Etsy (if handmade or vintage) Inventory risk, fulfillment and return costs
A browser extension or small app Chrome Web Store, Shopify App Store, WordPress.org Review processes, platform policy changes
Ebooks and courses Gumroad, Lemon Squeezy, Amazon for books Discovery is limited — bring your own audience

Before you list: the marketplace readiness checklist

  • You’ve read the seller or developer policies end to end
  • You understand every fee type and have priced with margin to spare
  • Your designs, names and product photos are original or properly licensed
  • You have a plan for customer questions, returns and refunds
  • You know which metrics you’ll check weekly (views, click-through, conversion, reviews)
  • You have a brand site or landing page ready, even if simple
AI angle: AI is great for drafting listing copy, brainstorming product variations and summarizing customer reviews (yours and competitors’) into improvement ideas. Always check that AI-written listings are accurate — a wrong size or material claim leads to returns and bad reviews.

A simple marketplace launch plan

  1. Validate demand. Search the marketplace for your idea. Are there sellers with reviews? Is there room for something better or more specific?
  2. Launch a small batch. List a focused set of products instead of hundreds. Quality and coherence beat volume.
  3. Measure and iterate. Track views, favorites, click-through and conversion. Improve images and titles on the weak ones.
  4. Expand what works. Add variations and related products around your winners.
  5. Diversify. Add a second marketplace or your own store once the first is running smoothly.

Related reading: POD with AI, build a micro-SaaS without code, and Lesson: marketplaces and partnerships. For the bigger picture, see traffic channels.

What’s in the box: Use marketplaces for buyers and validation, respect their rules, price with fees in mind, and steadily build a brand and an email list you own.