Credits are "virtual money" and are used to pay for ad promotions simply and without the need for credit or debit cards. Being an international website, it would be inconvenient to use different prices for each country for the purchase of our promotions. For this reason we use credits
To buy credits you must have created an account, and have logged into it, click on the "User" button in the navigation bar, and then click on the "Buy Credits" button, this will take you to the page where you can select the offer that you like the most, and complete the payment
To see your purchase history, you must be logged into your account, click on the "User" button on the navigation bar, and then click on the "My account" button, and finally click on the button "Purchase history" from user options