Open Integrations. The simplest path is the spreadsheet: click Download template, fill in your products and upload the file with Upload XLSX. You can re-upload any time — existing products are updated and new rows are added, so the file stays your source of truth.
The columns that matter most are SKU, name, EAN/barcode and your own price. Everything else is optional, but brand, model and manufacturer code all feed the matching engine later.
On the Starter and Pro plans you can connect your store directly instead — REST API, GraphQL or a product feed. Use Test to preview what the connection returns and Sync now to pull the catalog; after that you can re-sync whenever your assortment changes.
The more complete your data, the better the automatic matching later. EAN/barcodes give exact matches, so include them if you have them — a catalog with EANs typically matches several times more listings automatically than one without.