Hi Blaga, You have a couple of options for storing the data provided by the user: * Save the model's question data (and, optionally, its variable data) natively using the SaveFormData Function introduced in the final chapter of Course 2. * Connect to a suitable database, and use a Data Source to write the data away there. Data sources are fully explained in the online user documentation, and you can find a guide to using Data Source Functions here. To answer your second question, KnowledgeKube has a built-in MailChimp Data Provider, which lets you connect to your MailChimp account and exchange data like you would with any other type of data source. You can learn how to create a provider connection here. Tip: You'll find the MailChimp provider under the CRM and Marketing category when you reach the Model Data Sources window! I hope that tells you everything you need to know :)