GC offers text layouts to provide advanced validation options on text formatting and structure. You should use a text layout when you want to ensure that:

• a text has a certain structure (e.g. Headline 1, Paragraph 1, Paragraph 2, ...)
  
• a text has a defined item (e.g. a call to action "Buy now" with a hyperlink in the second paragraph of the text)
  
• a text can be exported as a whole or section by section
• a text can be exported as valid HTML or BB code

To see how to create a layout please go here: How to create a text layouts?