Ecommerce AR tools are relatively new, so must be highly discoverable and easy to learn. Calibration issues run rampant, and users must dedicate focused attention to interact with this unfamiliar feature.
In testing, we often see users who don't scroll a web page even though there is much useful info below the fold. Often, the reason is "the illusion of completeness" which causes users to believe that they are seeing all there is.
网站上的数据输入表单字段是至关重要的ecommerce and many other applications. Fields need labels and (sometimes) instructions, but placing this text inside the field lowers usability and accessibility and should be avoided.
Useful search suggestions lead to relevant results and are visually distinct from the query text. (This is about how to design the search feature on your own website, whether it's an ecommerce site or not.)