A noindex tag used in the head of an html document would look something like this:
<meta name=” robots” content=”noindex”><
Noindex is a commonly used command in marketing when content is created that the marketer wants to direct the user to instead of them finding it themselves. For example, goal completion pages or pages that are for employees only.
Noindex is also sometimes used if there are duplicate or near-duplicate pages present on a site and no option to implement canonical tagging.