The phrase "first section" refers to the beginning part of something that has been divided into different parts or portions. It typically comes before the second, third, or any subsequent sections. Full definition
The very first section of the resume other than your name and contact information will be a «summary of your qualifications» section. (resume2016.com)
If you're representing yourself, you can leave the line in first section marked «SC Bar #,» blank. (info.legalzoom.com)
A strong marketing promotions specialist resume must demonstrate how you'll be an asset to the company beginning in the very first section, the summary statement. (resume-now.com)