One stock figure
for every channel you sell on.

What does a single source of truth mean?

It means there is one place where the stock figure is true, and every channel reads from it. When a unit sells anywhere — website, marketplace or the shop till — the deduction propagates to the rest within seconds, and the same happens in reverse when goods arrive.

Without it, each channel keeps its own counter and overselling is a matter of time. Selling online what is no longer on the shelf costs you the order, your reputation and, on marketplaces, seller rating points.

How the sync works in practice

Every sale fires an automatic notification to the central inventory, which deducts and tells the other channels. It is not an overnight export or a spreadsheet somebody uploads in the morning: it is a matter of seconds, which is the only thing that works in peak season.

The check you cannot skip is trivial and decisive: sell one unit at the counter and watch the clock until it disappears from the website. If it takes more than a minute, you will oversell during the sales.

What connects to what

The catalogue, half the work and nobody mentions it

Syncing stock levels achieves little if product listings take three weeks to go live. That is the real bottleneck: goods arrive, go on the shop floor the same day and take weeks to appear online because nobody has had time to photograph and describe them.

That is automated too: from a photo of the product comes its listing with title, description and details, ready to review and publish. And the prerequisite is always the same: one code per reference, identical across every system. If the till calls an item one thing and the website another, no system recognises them as the same product.

What if there is more than one shop?

Each location is a separate part of the same inventory, and its till deducts from its own. What goes online is the total of the locations that can genuinely fulfil orders, not one shop’s counter.

That brings three rules to decide: which branch fulfils each order, how transfers between shops are recorded, and what happens when a customer has an item held at the counter. It is covered in the guide to syncing stock across channels.

How to test it before committing to anything

You connect one channel first with a small group of references, sell for real, and watch the clock. With that working you add the next. Wiring up every channel at once, in peak season, is the fastest route to reconciling by hand.

Nothing here is bought blind: every piece can be seen running before you decide.