This block is intended for more detailed configuration of which information about projects should be shown in their commercial offers and which should not be.
The checkboxes of this block almost completely duplicate the checkboxes of a similar block available in each specific project and responsible for configuring the output of its commercial offer. We are talking about the "Options" item, which is located in the "Print" subsection the "Estimate" section.
Accordingly, which fields you tick in the "Setting up the header of the commercial offer", those will be activated in the "Options" section of each new project of your company created after making changes here. And this, in turn, will determine the type of each new commercial offer. Thus, you get rid of the need to customize the content of this document in detail in a single project.