Product CSV guides

Plain answers to the questions that come up when you edit products in bulk with a CSV file. They're based on Shopify's help pages.

• What blank cells do when you import a product CSV When a blank cell wipes a value, when it resets one to a default, and when a value stays the same.
• Why changing an option value can replace a variant ID How a small rename in a CSV can create new variant IDs, and what to check first.
• How to check a supplier CSV before importing it A step-by-step routine for turning a supplier's file into a safer import.
• How to recover from a bad bulk price change What to do first, how to find the damage, and how to build a file that restores only what's wrong.