Grouping questions by sections makes it easier to evaluate responses from vendors by giving you the ability to jump between sections with one click when reviewing and it helps vendors track section completion rates when bidding which makes it faster for them to bid.

Every new questionnaire starts with default questions which you can name. Best practice is to start with a "Basic Information" section. 

To group questions by section, scroll down to the bottom section and click on +Add New Section. 

You can add a blank section or add a section from a saved template. If you add a blank section, click on the pencil icon to name the section:

You can drag and drop questions into your new section. Make sure to save your draft and you're all set!