1. Select Script Type: Begin by choosing the type of script you want to generate from the dropdown menu labeled "Select Script Type." Options include Pantip, Heylink, Y8, HTML5Game, and Yo.fan. Each option corresponds to a different ad platform with specific requirements.

2. Enter Pub ID: In the "Pub ID" field, input your Publisher ID. This unique identifier is necessary for the script to be associated with your account on the selected platform.

3. Choose Ad Size: From the "Select Ad Size" dropdown, pick the ad size you want. Options include various dimensions such as 728x90, 300x250, and more. This determines the size of the ad unit to be generated.

4. Enter Username (for Yo.fan): If you select the Yo.fan option, a new input field labeled "Username" will appear. Enter your desired username here. This customizes the URL in the generated script to include your username.

5. Generate Script: Click the "Generate Script" button to create the ad script. The script will appear in the "Generated Script" section below.

6. Copy the Script: To copy the generated script, click the "Click to Copy" button. This allows you to easily paste the script into your website or ad management platform.