For questions about singles, one of Craft's Section Types.

For questions about singles, one of Craft's Section Types.

Used for one-off pages, like your Homepage, which likely has a unique set of fields and a URL that doesn’t necessarily fall in line with other entries’ URLs.

Unlike the other section types, Singles only have one entry associated with them, and they don’t have an editable Author, Slug, Post Date, or Expiration Date.