How to build an ecommerce website: what it is made of, what to build first, and what to set up on day one
Most guides to building an online store start with picking a theme. We start with the data: 42.6 thousand orders in online stores we grow show where sales come from, when they arrive and who comes back. The build order follows from that: which pages first, how many products to launch with, what to set up on day one, and what it costs in money and time.
A store is a layout first. The question is which compartments you fill first.
39%
of item revenue in the median store came from its top ten products. Build the site around them
29%
of orders in the median store arrived between eight in the evening and seven in the morning, with nobody at the desk
13%
of orders in the median store came from returning customers, within nine months. Repeat buying is built from day one
What is ecommerce, and what is an ecommerce website made of
Ecommerce is buying and selling online, from choosing a product to paying for it, with no conversation needed. An ecommerce website is the online store where that happens: a site where a customer chooses a product, pays and gets an order confirmation without talking to anyone.
It is not a brochure site with a "buy" button. Several components work behind every order, and each must work when nobody is watching:
Storefront. The theme, home page, collection pages and product pages.
Catalog. Products, variants, prices, stock and images.
Cart and checkout. Where the decision is made, and most easily lost.
Payment, shipping, tax and invoicing. A payment provider that works in your market, shipping rates, the right tax on every order and an invoice or receipt where your rules require one.
Customer capture. Email signup, accounts and consent to receive messages.
Measurement. Analytics, Meta and Google pixels, and real store revenue.
Platform choice has its own article. In short: when the store is the business, we build on Shopify, because checkout, servers and updates are the platform's job, not yours. Why, and when to stay on WordPress, in Shopify vs WooCommerce.
This article is about the build itself. The numbers come from 42.6 thousand orders in Israeli online stores we grow, January to September 2026, across several platforms. Figures are aggregates, and the lessons hold for a store in any market.
How many products to launch your online store with
The common mistake is to start from the catalog: upload every product, build dozens of collections, then ask what will sell. Sales do not spread out that way.
In the median store, the top product alone brought 6% of item revenue, the top five 25%, and the top ten 39%. The median store sold about 230 different products. At the other end, about 68% of the products that sold at least once sold fewer than ten units in nine months.
How much revenue comes from a few products
Share of item revenue, before order-level discounts. Median across stores.
Top product
6%
Top five
25%
Top ten
39%
Source: Preneuriat client dashboards, online stores we grow, 1.1.2026 to 28.9.2026. Aggregates only.
The lesson: build around a small set of hero products, not a huge catalog.
Launch with what sells, in depth. A small catalog with complete product pages beats a large one with empty pages.
Hero product pages get the most work. Photography, copy, answers, reviews. One such page is worth twenty average ones.
The home page and menu lead to them, not to the whole catalog equally.
No sales data yet? Start from what already sells, at markets, on Instagram, on a marketplace or through resellers, and revisit the list after the first month.
The pages that sell, and the order to build them
Every page has one job. Build them in this order, by how much revenue depends on each:
Hero product pages. Where the decision happens. Shots alone and in use, a clear price, delivery time and returns next to the button, and answers to the questions customers ask over chat.
Cart and checkout. Few steps, shipping cost shown before checkout. A cost that appears only at payment is the classic cause of abandoned carts.
Home page. It directs rather than shows everything: to hero products, the current promotion and main collections, in one phone scroll.
Collection pages. Filters and sorting that work on mobile, hero products at the top.
Trust pages. Shipping and returns, terms, privacy, about, and a contact option that is easy to find.
Campaign landing pages. A page that continues the ad in message and look, instead of sending everyone to the home page.
The store sells while you sleep
In the median store, 29% of orders arrived between eight in the evening and seven in the morning. Nobody is there to approve an order, answer a sizing question or fix a failing coupon.
So everything between "add to cart" and "order received" has to run on its own:
Instant payment approval, by card and the digital wallets your customers use, such as Apple Pay, Google Pay or PayPal.
Automatic confirmation by email, with order number and expected delivery.
Tax and invoicing that run by themselves, calculated and issued without anyone touching the order.
Real-time stock, so a sold-out product is not sold twice.
Promotions scheduled in advance, with start and end times.
The test is simple: before launch, place a test order from a phone, late at night, end to end. If it needs a person to complete, the site is not ready.
Day one: measure, and keep the customer
Two things are almost impossible to add after the fact, so they go in before launch.
Measurement. Analytics connected, Meta and Google pixels reporting purchases at the right value, tagged links for every channel, and a dashboard of real store revenue against all media spend. The first months are the baseline for every later comparison, and uncollected data never comes back. Why store revenue beats platform-reported numbers: real ROAS vs reported ROAS.
Customer capture. In the median store, about 10% of customers ordered twice or more within the period, and 13% of orders came from returning customers. The median second order arrived about 30 days after the first. A caveat: the period starts in January, so some orders counted as "first" belong to customers who had bought before. So these figures are a floor. Even so, most customers bought once.
A returning customer does not just happen. You build one:
An email signup with a good reason, on the home page and product pages.
Consent at checkout for email and messaging updates, given explicitly, as privacy rules such as GDPR in Europe and the UK require.
A customer account for reordering without retyping.
A post-purchase email sequence timed around the first month.
A returning customer is not a gift. It starts with one field at checkout, on day one.
After launch: what to plan in advance
Launch starts the work. Plan three things during the build so they do not force a rebuild:
The basket. In the median store the average order value was ₪350 (Israeli shekels, tax included), 51% of orders held a single item and 51% carried a discount. Leave room on the product page and cart for a second item and bundles, and build promotions that run without a developer. How to grow the basket, in how to increase average order value.
Promotions and seasons. A promotion page, a countdown and product labels belong in the theme, ready before Black Friday and every seasonal peak in your market. Most everyday features are built into the theme itself, and apps are kept for what it does not do.
Back to the product pages. After a month of sales the hero list updates, and the work follows the pages customers actually reach.
What it costs to build an online store, and how long it takes
We will not quote prices, because they change and differ by market. A proposal should list each component separately: the platform (a Shopify subscription, or hosting and maintenance on WordPress), theme and design, setup (product upload, photography, copy, integrations, testing), payment processing fees on every transaction plus a platform fee in some setups, tax and invoicing tools, shipping, and ongoing work after launch.
Timing varies too, but the phases do not: scoping (hero products, audience, channels and what to measure), infrastructure (platform, payments, shipping, tax, invoicing and a test order), content and design in the page order above, testing on mobile and in measurement, then a soft launch before the first campaign. The pace is usually set by content and photography, not by development.
Common mistakes when building an online store
Uploading the whole catalog before a single product page is truly good.
Designing for desktop and checking on a phone only at the end.
Launching without measurement, with a promise to connect it later.
An app for every need, instead of building everyday features into the theme.
A checkout that depends on a person: manual approval, manual invoices, a chat reply as a condition for closing.
If you sell in Israel
An Israeli store adds its own layer on top of everything above. The theme has to be right-to-left Hebrew everywhere, including checkout and emails. Prices are shown in shekels with VAT included. Shopify Payments is not available in Israel, so payments run through a local payment provider, and every transaction needs an invoice that meets Israeli rules, which Shopify does not issue by itself, so an invoicing integration is part of the build. Shipping rates have to cover the whole country, and stores that observe Shabbat schedule promotions to open on Saturday night. The full local setup is in the guide to Shopify in Israel.
Building it with Preneuriat
Building a Shopify store is half the job. The other half is bringing buyers, and when different vendors do each half, something falls in between. We do both, for brands in Israel and in other markets.
One team for the site and the marketing. Whoever builds the store also runs the campaigns, so it is built around what they need: landing pages, bundles, countdowns and labels, in the theme, not in apps.
The same brand and message from the ad, through the landing page, to checkout, in your customers' language.
Measurement wired from day one, so the conversation about results is held in real revenue.
One contact for day-to-day changes. A banner, a weekend promotion, a price fix: one request, no coordinating a developer, a designer and an agency.
None of this guarantees a result. It removes a common risk: a piece that falls between two vendors.
Questions we get
What is ecommerce?
Ecommerce (electronic commerce) is selling products or services over the internet, where the customer chooses, pays and gets a confirmation without talking to anyone. An ecommerce website, or online store, is the tool it happens on: catalog, cart, checkout, payment, shipping and tax in one system.
How do I build an online store step by step?
Choose a platform, then build in the order revenue depends on: hero product pages first, then cart and checkout, home page, collections, trust pages and campaign landing pages. Before launch, connect payments, shipping, tax and invoicing for your market, wire measurement and customer capture, and place a full test order from a phone. Then launch softly, before the first campaign.
How much does it cost to build an ecommerce website?
It depends on the components and the market, and prices change, so we do not quote them. What to budget for: the platform (a monthly subscription, or hosting and maintenance), theme and design, setup work and product photography, payment processing fees, tax and invoicing tools, shipping, and ongoing work after launch. Ask for a proposal that lists each component separately, including the monthly costs.
Shopify or WordPress for an ecommerce website?
For a business whose store is the business, Shopify: checkout, servers, updates and security are the platform's responsibility. WordPress with WooCommerce is better when content is the business and the store is an add-on, or when there is deep custom logic and a developer who maintains it. The full comparison is in Shopify vs WooCommerce.
There was no guide to Shopify in Israel written from the data of Israeli stores, so we wrote one. We opened 27.3 thousand orders from Israeli Shopify stores over nine months of 2026: where orders come from, at what hour and on which day, at what discount, to which cities, and what to know before moving from Wix or WooCommerce.
Shopify vs WooCommerce is the question we hear most from store owners who have already been told to switch and are not convinced. This is the article we send them: what breaks on a WooCommerce store over the years, what Shopify changes structurally, what it really costs, who should stay put, and six questions that settle the decision in a minute.
Shopify Payments does not operate in Israel, so every Israeli store connects a local payment provider. We went through the official pages of five providers and of Shopify itself on 29.9.2026. The important finding is not the difference between the providers. It is an extra fee Shopify charges on top of all of them.
Daniel Hirsh29 September 202610 min read
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