A number of revisions are included with your project (listed below each service) but you can always add more revisions if needed. 
 
A revision constitues a change or variation to an initially presented—or in-progress—design concept, and is typically a change of less than 1/4 of the design. A revision is simply meant to be a slight modification or course correction to progress toward the final design. Revisions will take time and resources
 
A new design concept is not considered a revision.