Welcome Gift:
For starters, your 125 x 125 banner ad will be displayed 5,000 times free on other blogs.
This will get you some subscribers.
Results:
If your are not getting great results (clicks to your blog) you have to change your ad. Some ads just don't perform. You can upload three different ads and learn which one works best for you. Or, keep changing your ad until you find an ad that is a click magnet.
Categories:
This is important. You select the specific blog categories from the list below that best relate to your content. The algorithm will take it from there and determine which are the best visitors to send to your blog.
Note: You Can Select up to four categories to trade traffic. Selecting one category is for more targeted quality, but less traffic volume. Selecting four categories is for more traffic, but broader and possibly lower quality traffic.