Sections are stacked vertically along your subpage, and may be arranged to prioritize or highlight information over another, or improve the aesthetics of the layout. Putting more careful thought in the placement of the sections increase engagement to your subpage as it has direct impact with usability, readability and overall user experience.
To arrange the sections in your subpage:
Hover over the section that you want to move;
At the upper right corner of the section, look for the white arrow buttons on top of blue borders as your mouse hover over the section;
Click the up / down arrow to move the section to your preferred location in the subpage.