The best thing that you could probably do to ensure that your users have the best experience when they visit your site is by ensuring security in your website. This will prevent any accidental transactions made by the users and this in turn will raise the level of trust of the users.
Over the years UX design has seen dramatic changes which are reflected in the voice assistant features in the echo devices that you find today. These devices help the users to place any order automatically. Such a change in UX design is the result of a default setting of these devices that do not need any confirmation to place an order from the end of the users.