Something I missed on the course in the afternoon | Word forum

This is called 'Quick Parts'. It can be found on your Insert tab in the Ribbon.

If you highlight the section of text that you want to repeat, then click on 'Insert > Quick Parts > Save selection to Quick Part gallery'. Give it a name, and then press OK to save it.

Then, whenever you want to use that text string, you can go back to 'Insert > Quick Parts', and it will be there to be clicked on.

Quick Parts can also handle other things like pictures and wordart, so it isn't just for text.