Session vs Local (wix-storage) - for handling user data - which is better for which use-case?

Hi,
I’m about to handle user-data in my Wix app and wondered what is the best practice to handle this data in specific use-cases.

  1. What are the differences between the two in terms of security\privacy for my site’s users?
    i.e. when & where each data is accessible, when is the data getting wiped, etc.

  2. In which case (session / local) the data is accessible when moving to another path in the app.
    i.e. if I save some string when a user logs in to the app, and I want to access it (safe & secure), in another page.

Thank you!