Layout is the heading that shows you your page rather than a form. It lists the sections your Avenue can carry and you drag them into the order that sells you best.
Video is a single video, full width, and sits at the top by default. Current listings is a grid of the homes you have on the market. Recently sold is social proof: each closing is a card in the same grid and at the same width as a current listing, carrying a Sold plate on the photograph and the price underneath, because the price is the fact a closing is making. Video and photos is a strip of your own finished media. Resources holds your links and guides.
Each row tells you what is actually in that section right now, so a section with nothing in it says so instead of looking broken.
You can hide any section, and hiding is reversible. A section you leave visible but have not filled renders nothing at all, so the page can never open on an empty heading.
If a new kind of section is added to the product after you last saved your layout, it appears at the end of your order, visible, rather than staying hidden until you go looking for it.