Starting to Sell on Marketplaces: A Step-by-Step Guide for Small Businesses

What a marketplace gives you, and what it costs you

The biggest advantage of a marketplace is traffic: people are already there looking for products. Payment security, invoicing and shipment tracking are already in place, so you don't have to deal with a technical setup.

In exchange, you give up a few things:

• The customer relationship: The customer usually belongs to the marketplace; your access to their contact details and your ability to reach them directly are limited by its rules.
• Price pressure: You are listed side by side with other sellers of the same product, and shoppers can compare in one click.
• Dependence on the rules: Commission rates, shipping deadlines and listing rules are the marketplace's decision and can change over time.

That's why it is healthier to treat a marketplace as one of your sales channels, not the only one.

Before you apply: documents and preparation

Large marketplaces in Türkiye usually require sellers to be registered for tax and able to issue invoices. A sole proprietorship, a limited company or, on some platforms, the tax exemption offered to small traders for online sales each come with different obligations. Talking to an accountant about which structure suits you protects you from mistakes that are hard to fix later.

Having these ready before you apply speeds things up:

• Your tax certificate or relevant registration document, ID and bank account details
• A list of the products you will sell, stock quantities and barcodes if you have them
• Clear, well-lit photos with a plain background for every product
• Packaging materials and a space where you can prepare parcels

Calculate your price correctly

The most common marketplace mistake is listing a product at the in-store price and only noticing the deductions later. Write down every item that will come out of the sale price:

• The marketplace commission (it varies by category; check the current rate in the seller panel)
• The shipping fee and, if you offer free shipping, the full cost of it
• Packaging materials
• Platform-specific extra charges such as payment or service fees
• Return shipping for returned items, and products that can't be resold
• Taxes

If what is left after these deductions doesn't cover the product cost and your labour, you either need to reprice or not sell that product on the marketplace. Not every product suits every channel; for cheap, heavy items, shipping costs can wipe out the entire profit.

The product page: photos, title and description

On a marketplace the customer can't touch the product; they decide by looking at the photos and description. The first photo should show the whole product on a plain background, and the following photos should show details, a comparison that conveys size, and the product in use. Many marketplaces have their own rules for the cover photo (background colour, no text or logos, and so on); read them before you list.

Use the words a customer would type into the search bar in your title: product type, material, colour, size. Phrases like "Perfect gift!!!" do nothing in search results. In the description, clearly state dimensions, material, care instructions, what's in the box and delivery time. Answering every question a customer might ask in the description cuts down both questions and "not what I expected" returns.

You'll find detailed tips on product photos and descriptions in our guides on product photography with your phone and how to write product descriptions.

Shipping, stock and returns

Marketplaces largely judge sellers by on-time shipping and cancellation rates. Selling an item that is out of stock and cancelling the order loses the customer and can lower your store rating. If you sell from the same stock in your shop and online, make updating stock after every sale a habit, or use a tool that keeps stock in sync.

• Choose a realistic dispatch time; a shorter one looks more attractive, but missing it does damage.
• Give fragile items extra protection and test your packaging by shipping it once.
• In distance selling, consumers have a right of withdrawal; handling returns smoothly heads off negative reviews.

Reviews and store rating

On a marketplace, reviews matter as much as the product itself. A new store's first reviews directly shape the decisions of the customers who come next. Buying reviews, having fake reviews written or offering customers a discount in exchange for a review breaks marketplace rules and can lead to penalties up to closing your store.

The right approach is simple: ship the product exactly as described, pack it with care, and answer questions quickly and politely. When a negative review comes in, don't get defensive; write a short reply that acknowledges the problem and offers a solution. For more on this, see our guide on replying to customer messages and reviews.

Use the marketplace together with your own channels

Marketplace customers stay on that platform; your Instagram account, your Google Business Profile and your shop belong to you. Showing your marketplace store on your social profile helps people who prefer to buy there with confidence. In the other direction, putting a business card or a short thank-you note in the parcel (as far as the marketplace's rules allow) helps customers remember your brand.

When you sell on more than one channel, keeping track of stock, orders and prices gets complicated. At that point, watching orders and stock from a single screen saves time; for integration options, see our guide on e-commerce integrations.