A typical layout might have a section for the header, body, and footer. The content that you plug into sections takes the form of blocks that are stored in your Block Library.
To mark the start and end of a section use the follow HTML comment codes:
|Width||No||By default, any blocks which have a Width property greater than a section's Width will not be shown when a user tries to add blocks to the section. This helps prevent users breaking template layout by adding blocks that are too wide.|