Quick answer
A Mulebuy spreadsheet is useful when it helps you move from a broad list of links to a smaller shortlist. Start with the category, check photos, sizing, price context, and shipping weight, then continue only with rows that still make sense.
How to use this site
Begin with the row you found. Decide what kind of item it is, then use the relevant guide: categories for item type, checklist for QC photos and sizing, shipping guide for weight awareness, and safety notes for support or refund questions.
Some users search by brand or model, but category-first browsing is cleaner and safer. Start with shoes, bags, watches, jackets, hoodies, or accessories, then inspect the external product details yourself.