A footer is the closing area at the bottom of a webpage. It often contains helpful links and information that support the page but do not need to sit at the top.
You might find Privacy, Terms, Contact, and a copyright notice there. A long article can have its own footer with details about that article, separate from the footer for the whole site.
Keep the links organized and readable. A footer is not a place to hide information people need before making an important decision; those details should appear near the relevant choice too.