The customer is no longer a "store customer" or an "online customer"; they are one person who examines a product on the shelf and orders it from their phone at night, then exchanges what they bought online at the store the next day. The problem is that many retailers' systems still see this person as two separate customers. In this article we explain what an omnichannel setup that unites store and e-commerce under one roof looks like, and how to build it step by step.
What is omnichannel, and how is it different from multichannel?
The two terms are often used interchangeably, but the difference between them is not the number of channels — it's channel integrity. In a multichannel setup, the business sells through more than one channel: a physical store, an e-commerce site, perhaps a few marketplaces. But each of these channels operates like a separate island, with its own stock, its own price list, and its own customer records. A sale at the store register doesn't change the site's stock count; a campaign configured on the site goes live without the store staff knowing about it.
In an omnichannel setup, the channels are limbs of the same body: stock is managed from a single pool, the customer is recognized by the same record no matter which channel they arrive through, and prices and campaigns are consistent at every touchpoint. From the customer's perspective the difference is simple: in multichannel you hear "you bought it on the site, the store has nothing to do with it"; in omnichannel, where you bought it stops mattering.
The table below summarizes how the two approaches diverge in practice:
| Dimension | Multichannel | Omnichannel |
|---|---|---|
| Experience | Each channel runs by its own rules; switching means the customer starts over | The journey starts in one channel and continues seamlessly in another |
| Stock | Separate stock per channel, no cross-channel visibility | One central pool; every channel sees the same real-time count |
| Data | The same person is a separate customer record in each channel | A single customer profile with the full purchase history in one place |
| Measurement | Channel-based revenue reports; channels compete with each other | Customer-based total value; channels feed each other |
The customer's journey across channels
It's more accurate to think of omnichannel not as a technology project but as an effort to catch up with behavior the customer already exhibits. The most common cross-channel behaviors today are these:
- Webrooming: The customer researches the product online, compares reviews and prices, and completes the purchase in the store; this is especially common in categories where size, texture, and color matter,
- Showrooming: The exact opposite; the product is tried in the store, and the order is placed later from a phone. The retailer who makes this easier instead of trying to block it steers the sale to their own site rather than to a competitor,
- Click & collect: The order is placed online and picked up at the store; the customer skips waiting for a courier, the business saves on shipping costs, and the customer who comes into the store often makes an additional purchase,
- In-store returns: Returning or exchanging an online purchase at the store; compared to the shipping route it is both faster and creates the opportunity to turn a return into an exchange.
You can add two-way stock usage to the list: when a size runs out in the store, it is ordered from the site while the customer is still there and shipped to their home; conversely, an e-commerce order is shipped from the nearest store's shelf, shortening delivery time. None of these are exotic scenarios; customers have begun to see this flexibility not as a privilege but as the expected standard.
Each of these behaviors turns into a crisis scenario when the channels operate separately: store staff can't see the order placed on the site, the register system doesn't recognize the invoice issued online, and the customer shuttles back and forth between the two sides. On the specific topic of returns, we covered in detail how to turn that process into a loyalty opportunity in our article on turning the return and exchange process into a competitive advantage.
The four core requirements of a single roof
All of the scenarios above share one technical precondition: the channels must look at the same data. However different the storefront design, the app interface, and the store concept may be, four things must be single and shared behind the scenes:
- Central stock: Store, warehouse, and e-commerce stock is kept in a single pool; every sales channel sees the same count in real time. If you sell on marketplaces, this is a problem you're already familiar with; you can find the fundamentals of the logic in our article on setting up marketplace stock synchronization,
- A single customer record: One profile matched by phone number or email; both the sale at the store register and the site order are written into the same history,
- Consistent pricing and campaigns: When the price on the tag differs from the price on the site, the customer sees either an invitation to haggle or a trust problem; campaigns must apply across all channels at the same time and under the same conditions,
- A shared loyalty balance: Points earned in the store must be spendable on the site, and vice versa. Points locked inside a channel tell the customer "you are actually two separate companies"; we collected the other traps in program design in our article on the 6 mistakes made when designing a loyalty program.
"The customer doesn't have to know your channel structure; in their eyes there is one brand, and they expect that brand to remember them everywhere."
Implementation steps: in sequence, not all at once
Moving to omnichannel does not have to be a "big bang" project where every system changes on the same day; when set up that way, it usually ends up shelved. The workable sequence is this:
- Unify the inventory: First move store and e-commerce stock into a single pool and match the product codes (barcode/SKU); every other step is built on this foundation,
- Start with click & collect: As the first bridge between channels, click & collect is the lowest-risk step; pilot it with a limited number of stores and settle the pickup process and staff workflow,
- Open up in-store returns: Make it possible to return and exchange online orders at the store; the register system being able to see and process an e-commerce order is the precondition for this step,
- Make staff incentives channel-agnostic: This is the most commonly skipped step. If store staff commissions are tied only to sales that go through the register, steering the customer to the site works against them. Credit the store for the online sales it influences (click & collect pickups, orders initiated in the store); otherwise even the best setup meets internal resistance.
The same principle applies at every step: before moving on to the next link, run the current one at a small scale, fix what falters, then roll it out. A setup that can't run click & collect smoothly in a single store has no chance of running it in twenty; conversely, a process that has settled in one store transfers to the others at almost copy-paste speed.
Measurement: read by customer, not by channel
Once the channels are united, reporting habits have to change too. The sentence "store revenue fell, site revenue rose" says nothing on its own in an omnichannel business; if the customer tried in the store and bought on the site, the revenue moved — it didn't disappear. Channel-based tables make the channels look like rivals and lead to wrong decisions, such as downsizing the store that appears "inefficient."
The correct reading is along the customer axis: compare the purchase frequency, average basket, and annual total value of customers who use a single channel against those who use more than one. See in your own data whether the multi-channel customer is more valuable; separately flag the additional in-store purchases made during click & collect pickups and the sales started in the store and completed on the site. This perspective turns the question "which channel won" into "which combination of channels makes this customer more valuable." The same logic applies to campaign evaluation: if you ignore the effect of a site-only discount code on store traffic, you will measure the campaign's true return as lower than it is.
Uniting store and e-commerce is not a project with an end date; it is a way of running the business. The retailer who proceeds in sequence from inventory to incentives, expanding each step by measuring it, ends up reflecting in their systems the journey the customer is already taking. The rest is the customer carrying on with their shopping without worrying about where they bought it.