What techniques of "soft landing" of the user (registration on the site) can you share?

Question

JavaScript

For example, I liked the technique: at the entrance, the user is prompted to enter just a name. This name is stored in localStorage. Interestingly, the user's materials are also saved, but it is proposed to register so that this data is already stored on the server. Here I still do not understand - where is the data stored until the user is registered? In localStorage I see only the username, but the data itself is missing.
I wonder how this is done, perhaps offer other options for a "soft landing"?

Answer 1

In order not to burden the user with the basics of the web, he is simply told that his data is "stored in the browser".
What it really means is "The data we store on the server is tied to the cookie you have in your browser. If the cookie is lost, your data on the server is lost." Rather, the data on the server will not be lost, but will "hang", i.e. turn into garbage, which is the same as "lost".

Answer 2

and where is the data stored until the user is registered?

The data is stored on the server in the session.