Complete contact pages, navbar to footer: a page header, then the form beside the channels, a centred form or a directory of inboxes, backed by figures, proof and an FAQ. Five finished pages.
A section is one full-width band: a hero, a pricing table, a footer. A page stacks several of them into a finished screen, from the navbar to the footer. The sections are the parts, the page is one tested way to put them together.
Koala UI