Wix Code gives you a lot of control over your dropdown lists and how they work with your data.
You can manually define the list labels (what your visitors see) and their values (the value you save based on their selection) in the Manage Drop Down List panel. But you can also automatically create a dropdown list from a field in your collection.
To do this, open the Connect to data panel for your dropdown and go to the Connect a List section. There are a few things to remember when you connect a dropdown list to your data.
The collection you use to maintain your dropdown list does not have to be the same collection you use to store your user data.
If you connect a dropdown list to your data it overrides the settings in the Manage Drop Down List panel. Also, both the labels and values of each item will be the same, based on your data. They cannot be set independently as you can in the Manage Drop Down List panel.