These are used to display large forms in sections so that they are more user friendly.
By default, there is a simple Main Details section set up already.
You can display a line around sections or tick the "Invisible" box to hide it. You can drag and drip sections and form fields into place as well.
Add / edit the fields in your form to collect the data you need.
Now build up all your fields on the form and then you can add processes via the Logic Filter, if required