A website needs looking after once it is live. It has to be hosted somewhere, backed up, and kept up to date, and every so often something small needs to change: a photo swapped, a line of text corrected, a new phone number. The hosting and maintenance plan is how Jeff takes care of all of that for you, so you are not left to work out the technical side yourself.
The plan is optional. You do not need it to own your site. The website and the domain belong to you either way, and there is no long-term contract.
It is billed monthly, and the price is given on the call rather than printed on this page.
Because Jeff built the site, he is also the person looking after it. When you need a small change, you ask the person who knows how the site was made.