Attaching text to a path

As an alternative to rectangular text blocks, you can draw a path and attach text to it. The text flows along the shape of the path. Both the text and the path are editable.

A path to which you attach text temporarily loses its stroke, fill, and filter attributes. Any stroke, fill, and filter attributes you apply subsequently are applied to the text, not the path. If you then detach the text from the path, the path regains its stroke, fill, and filter attributes.

If text attached to an open path exceeds the length of the path, the remaining text returns and repeats the shape of the path.

Text on a path that returns and repeats the path shape

 community help (adobe.com)