This function is only enabled for paying users. You can use this function to refresh the recognized domain link graph. When you use this function, you control a given crawler’s work pattern. This is extremely useful when you what to know what others are currently competing over and what they are competing over in the future.
Take a look at this video and pay attention to the last part.
Consider the scenario where your competitors are building links where Googlebot isn’t so active, on blogs, etc. This is a well-known scenario, where you know what your opponents don’t want you to know.