What does the import preview show before committing?

Before any data is written, the preview parses the file (read-only, no writes) and shows what the importer understood: the total row count, the top categories it found, how deep the category tree goes, how it mapped the spreadsheet's columns to product fields, and whether it detected an image-URL column. This lets you catch problems — a mis-mapped column, an unexpected category structure, a…

Before any data is written, the preview parses the file (read-only, no writes) and shows what the importer understood: the total row count, the top categories it found, how deep the category tree goes, how it mapped the spreadsheet's columns to product fields, and whether it detected an image-URL column. This lets you catch problems — a mis-mapped column, an unexpected category structure, a wrong file — *before* committing thousands of rows to the database. Only when you confirm does the actual import job run. The preview is a safety checkpoint that turns a risky bulk operation into a reviewed one.