In brief
HTML footer provides information about its relevant section or document, such as authorship and related links. It can close an article within a larger page.
Useful to know
HTML footer provides information about its relevant section or document, such as authorship and related links. It can close an article within a larger page. [1]
It is not a command to place content at the viewport's bottom. If a short page leaves space beneath it, the solution concerns layout rather than the element's semantic name.
Sources
For further detail and to check the information: