When you connect text boxes, text that won't fit into the first text box flows into the next connected text box. A chain of connected text boxes, also known as a story, can span multiple pages and have numerous columns.
To handle overflow text, you can choose to either have Publisher find an empty text box (or create a new one) to hold the overflow text and automatically connect this text box to the first text box or you can connect text boxes manually.
Use connected text boxes to do the following:
Continue a story in another text box.
Create columns of different widths.
Move overflow text into another text box.
Other things to keep in mind about connected text boxes are:
The only object to which you can link a text box is an empty text box that is not already part of a chain of connected text boxes.
The following text boxes can't be part of a chain of connected text boxes: headers or footers, navigation bars, inline objects, personal information text boxes, or text boxes that use Autofit.