If at the end of the project you need to save certain data, you can use the same tools as for loading data: lists, files, tables, Google tables, databases.
For example, you have created a template for registration on the site. You used profile variables for login and password: {-Profile.Login-} and {-Profile.Password-}.
To save this data, you use one of the actions: List Processing -> Add line, Table Processing -> Add line, or Files -> Write text. And in the "value" field add these variables with the delimiter you need.
If, for example, your project is executed with an error for one reason or another (this happens often when using low-quality proxies), you can save the necessary data that was taken during the project (for example, an e-mail from the list) using the Bad end.