Managed Metadata
Managed metadata on SharePoint online provides a formal and controlled way to classify content using hierarchical collections of terms, grouped by term sets, which can be used as metadata and keywords on SharePoint content. Centrally managed metadata ensures consistency across SharePoint sites and helps with the discoverability, sorting, and filtering of content using search. Enabling the Enterprise keywords feature on the library or list level provides a simple way to consume managed metadata terms. Another way is to create a managed metadata column and attach a term set to it on the list or library level.
A term set is a collection of terms, for example, products, which can either be a flat list hierarchy or be a maximum of seven levels deep. Term sets can either be controlled and centrally authored taxonomies or act as a folksonomy where users can add new terms.
Term sets can be published either from the central term store in the SharePoint admin center or...