Commerce

Every commerce business, whatever its model, is built on the same three records: a catalogue of things for sale, a count of what is available and an order that turns one into the other. The trouble starts when the model does not fit the tool. A retailer's catalogue needs variants built from attributes with stock per location; a wholesaler's catalogue needs pack sizes and a price that depends on who is looking; a marketplace's catalogue is written by hundreds of vendors and needs moderation; a digital store's catalogue is files with versions and licences; a subscription brand's is contents per cycle; a resale community's is one-off items with a condition grade; an auction house's is lots with estimates and reserves. Software that treats all of these as a product with a price and a quantity is where the sector's operational trouble begins.

Money moves differently in each model as well, and the system has to record it faithfully. A shop takes payment at checkout and refunds against it; a wholesaler raises invoices on credit within a limit; a marketplace takes one payment and splits it across vendors, less commission; a subscription bills on a cycle and must retry when a card fails; a resale marketplace holds the buyer's payment until receipt is confirmed; an auction invoices the buyer with a premium and settles the consignor less commission. In every case payment runs through a provider chosen with the business and connected through a provider-independent layer, funds that are held or split sit with the provider under its terms, and VAT is applied from rules the business configures rather than decided by the software.

Fulfilment is the third shared concern and the one most often done by hand. Pick lists, carrier labels and tracking, click-and-collect, batch dispatch on a cycle, download links that expire, collection windows after a sale: each is a workflow with a cut-off, a hand-off and a customer waiting for a message. Returns, refunds and disputes run the same path in reverse and need a record of what was agreed at every step, because the person settling the argument was not there when it was made.

Finally, commerce businesses rarely live inside one system. Tills, warehouse and accounts systems, carriers, shopping channels, review platforms and mailing tools all need connecting, and each connection is scoped on its own terms against what the provider publishes. These are the capabilities every topic in this sector shares; each topic then adds what makes it different, from the wholesaler's buyer approval chain to the auctioneer's soft close.