How to start selling online: e-commerce and marketplace guide

Online selling is the fastest way to take your product beyond your city. But "opening a store" and "making sales" are different things: channel choice, product page, logistics, customer service and marketing must work together. In this guide we cover how to choose between your own store and marketplaces when starting online sales, the steps, costs and growth strategies.

Channel choice: own store or marketplace?

Marketplaces

Advantages: Ready traffic and customer trust, quick start, ready payment and shipping infrastructure. Disadvantages: Commission and extra fees, heavy price competition, limited customer data and brand control, dependence on platform rules.

Your own e-commerce site

Advantages: Brand and customer data are yours, higher margin potential, flexible design and campaigns. Disadvantages: You must build traffic and trust from scratch; technical and operational responsibility is yours.

Recommended approach: hybrid

Get data and sales quickly through a marketplace, build your own site and email list in parallel and gradually move traffic to your own channel. See building an e-commerce site and starting an e-commerce business.

Step-by-step start to online selling

1. Product selection

• Assess demand, margin, shippability and return risk.
• Start with few products; expand with sales data.
• If possible choose an original or brandable product; a product "everyone sells" ends in a price war. See competitor analysis.

2. Sourcing and stock

Options are your own production, wholesale purchase or dropshipping. For dropshipping see the dropshipping guide. Organise stock tracking from the start.

3. Product page

• Clear, multi-angle, high-quality photos
• Original title and detailed description
• Technical info such as size, dimensions, material, care
• Reviews, FAQs and clear return terms
• Search-friendly title and description; see the SEO guide

4. Pricing

Calculate net margin including cost, commission, shipping, returns, ads and tax. See pricing psychology.

5. Logistics

Fast, trackable shipping, solid packaging and clear delivery times determine satisfaction. Design returns from the start.

6. Legal and financial duties

Clarify trade registration, tax, invoicing and consumer rights (withdrawal, returns, pre-contract information). See the returns and distance-selling guide and the data protection checklist.

7. Customer service

Answer questions quickly; handle negative reviews professionally. See building customer support.

Traffic and growth

1. Search engines: SEO on product and category pages; see the SEO guide.
2. Paid ads: Search and social ads; see search ads.
3. Social media: Product content and community; see finding customers on social media.
4. Email marketing: Cart-abandonment, welcome and campaign emails; see email marketing.
5. Loyalty and referral: Repeat sales and referrals; see customer loyalty.

Metrics to track

• Visitors and conversion rate
• Add-to-cart and cart-abandonment rate
• Average order value
• Customer acquisition cost and lifetime value; see CAC and LTV
• Return rate and customer satisfaction

Common mistakes

• Starting with many products and tying up stock
• Depending only on a marketplace
• Not building shipping and return cost into prices
• Weak product photos and descriptions
• Neglecting mobile experience
• Not collecting customer data

FAQ

Do I need a company to sell on a marketplace? It varies by platform and country; trade registration is usually asked. Verify with an accountant.

How long until my first sale? Days to weeks on a marketplace; longer on your own site depending on how long traffic takes to build.

Which products should I sell? Start with products whose demand is validated, with enough margin and easy to ship.

Conclusion

Success in online selling is the combination of the right product, the right channel and regular operations. Starting with a marketplace and investing in your own brand and channel gives sustainable growth. For selling abroad, see the e-export guide.