As an active surfer you may have amassed extra credits, convert them if you are running low on Banner or Text Ad Credits.
In the 'Tools Area' scroll down to the Convert Icon and click to open:

Once open you will see the following which shows you how many credits are available for 'conversion':

Step #1: This is where you would select which credits you want to
'Convert'Example:
Web Site Hits = 72 (Surfing Credits)

Step #2: Enter the number of Credits you want to 'Convert'
(The above example shows 72 Website Credits)
Enter the Amount (72) in the ;
Enter Amount: Field From the Drop Down Select Conversion (Website Hits => Conversion Credits in this case)
Click Convert to complete the first phase

Step #3: The 72 Website Credits have been converted to
'144 Conversion Credits'
Step #4: Once the 'Conversion (144 credits)' is complete you will be able enter the Amount of Conversion Credits to 'Allocate' to Website Hits, Banner Credits or Text Credits