When you choose Add Section, you type a name for the section.  (see Section Manager)

Section: The names can by anything descriptive of your purposes.  Computer stores could identify different computer systems such as Server, Office 1, Front Counter, etc.  Garden Center Landscapers could identify work areas such as Patio, Front Walkway, Backyard, etc.

Include In Printout: Typically you will want to print all sections and contents of sections, but you do have the option to not include a section which contains notes to yourself.

Insert Section:  establishes the position of the section relative to other sections (Top, Bottom, or At Cursor) already defined.  If you change your mind, the section can be repositioned. Section Limits?