Build a time zone picker that defaults to the visitor's zone
Pre-select a visitor's own time zone in a settings form using their IP address, instead of asking them to search for it themselves.
Tag
#ux
Add a "detect my location" button without the browser prompt
Skip the browser's location permission dialog by detecting an approximate location from the visitor's IP address entirely on your own server.
Add a country dropdown that defaults from IP
Pre-select the right country in a signup or checkout dropdown using a visitor's IP address, saving a scroll through a long list without ever removing their choice.
Build a "did you mean" suggestion box with autocomplete
Show a short list of likely matches as someone types an address, so a typo gets corrected quietly before it is ever submitted on the form.