I am going to make a site like SERPBook.com. User will registered on the site and add the projects and keywords. Keywords limits added. Users buy the keywords packages (Subscription for every month) Keywords of the projects update every hour or limit set. In project tab, there will (Top 3, Top 10, Top 20, Top 50, Top 100) keywords. So the user can easily judge the ranking of his site. Payment mode added in the site and packages make. So, user can select the package and make a payment. Coupon code also so i can offer promotion code on some different events.