After logging into the user panel, create a group (1). The group is a collection (folder) of your lists, and it’s simply used to organize them in the panel. Then, create a list (2) and enter a name for the list (3).
After creating a list, hover over its name, and then click Install (4).
Now you need to configure the type of push sign-up widget and generate the code that you will put on the website. Go to step 2.