What do NoIndex, NoFollow, and NoArchive mean in the Page SEO window?

What do NoIndex, NoFollow, and NoArchive mean in the Page SEO window?

These are all Robots Text which instruct search engines how to handle the page.
  • The NoIndex tag tells the robots not to index the page.
  • The NoFollow tag tells robots not to follow the links on the page.
  • The NoArchive tag tells robots not to store a cached copy of the page.