Conversion gets the headlines. Engagement tells you whether anyone actually uses the thing. An AR feature nobody taps is a line item, not an asset. - What share of product-page visitors open the AR view. That is metric one. - How long they stay with it. Dwell time is the sleeper: deliberation used to happen in a showroom, now it happens on a product page. - Whether AR users convert at higher rates than non-users. - Share rate: shoppers who send the AR view to a partner are doing your marketing for you. - Repeat usage: one open is curiosity. Three opens across different products is a shopper sold on the format. - Published brand data keeps showing the same combo: AR users engage longer and buy more. - Direction matters more than precision. Every brand measures differently, so cross-brand comparisons are rough. ModelSnap produces the 3D model and AR preview file, $4.99 per HD model.