Keep the identifiers that already work
SKUs stay as text. A code such as 00124 keeps its leading zeros and remains distinct from 124. Duplicate SKUs, missing names and missing base prices receive row-level explanations.
Your spreadsheet is a useful starting point. Map your existing column names to catalog fields, choose your worksheet and correct the issues that would otherwise reach the buyer’s PDF.

SKUs stay as text. A code such as 00124 keeps its leading zeros and remains distinct from 124. Duplicate SKUs, missing names and missing base prices receive row-level explanations.
Use exact image filenames or SKU names in a ZIP of PNG, JPEG or WebP photos. Unmatched files and ambiguous matches are visible, and you can select a photo yourself. Arbitrary external image URLs are not fetched.
Previewing a file leaves your confirmed products alone. Review the validation report and selected changes before confirming. On later imports, a missing row is a candidate for review, not an automatic deletion.