I can imagine it being a bit more sophisticated than that, such as after a few clicks they learn a preference for leather straps or gold faceplates, or a classi

I can imagine it being a bit more sophisticated than that, such as after a few clicks they learn a preference for leather straps or gold faceplates, or a classic design so you start sorting "browse" pages differently. If you have enough data, you might also be able to discern "customers who looked at x usually end up buying y". Those preferences could also be carried forward if they're making use of retargeting ads.