A group is created for every question you add that is separated from your other questions by things like blank space, section or page breaks, text, images, and videos. Questions that are displayed back-to-back in the form editor are part of the same group. Questions from different groups will be visually separated on your live forms.
Hovering your cursor over a group of questions will reveal a pop-up menu that gives you access to options such as copying, dragging, and deleting the group of questions.
There are several ways to add a new question group: