Make Term Set Available To Other Site. The Available for tagging panel appears. Then click on Term Store Management that is available under Site Administration.
On the Intended Use tab an option for Terms to be available for tagging and the other for availability of Terms to be used as Site navigation are available. Then click on Site Settings. Enabling site navigation means you can use the terms in this term set for.
In this article Ive shared how to create term set and terms using SharePoint online admin portal.
Use the sample file as a template for creating an import file. From Settings select Site Settings. On the sites Settings menu select Site Settings. Then click on Site Settings.