Set up TikTok Shop Seller Center and import your catalog — either through a native Shopify/WooCommerce integration or a CSV upload with title, price, images and inventory for each SKU. Every product needs to be approved and 'live' in Seller Center before it can be attached to any video, so do this before you script or film anything; a finished video with no product to attach to is dead weight.
Catalog approval can take anywhere from a few hours to a couple of days depending on your category — restricted categories like supplements and skincare go through an extra compliance review, so if you're launching in one of those categories, submit your catalog at least three to four days ahead of your planned video launch date rather than the same week. Check each listing's compliance status individually; a batch import can silently leave a handful of SKUs in a 'pending' or 'rejected' state while the rest go live, and you won't notice until you try to attach a product card that doesn't exist yet.
Fill in every optional field your category allows, not just the required minimum — size charts, ingredient lists, shipping timeframes and certification badges all show inside the in-app product card a viewer taps on mid-video, and a thin product card sitting next to a persuasive, well-produced video creates a trust gap. A shopper who's convinced by your video but finds a sparse product page resolves that gap by leaving TikTok Shop and searching for the product elsewhere to double-check it, which is exactly the moment you lose the in-app checkout advantage TikTok Shop was built to give you.