1. Log into your Insticator account.
2. From the main screen, click Add Website.
3. Enter your Website, Estimated Monthly Page Views as well as the desired sizes and number of ad units for web and mobile sites. Then click Create.
4. You will see your new website added to the All Websites drop down menu.
Your website's widget and ad unit codes will immediately configure and be accessible within the Widgets section of your account dashboard.
Check out Where can I find my widget codes? and How to install your widget codes inside your HTML editor for more details regarding your widget codes.
NOTE: You can add in multiple websites into one account. You do NOT have to sign up for a new account to create a widget for a subdomain.