In order to be able to create the Snapchat pixel you need a Snapchat ad account. You can use an existing one, otherwise create a new ad account in the Snapchat business manager.
- Open the Snapchat business manager at business.snapchat.com
- Open Pixels in the menu on the left and then click Create Pixel
- Give it a descriptive name and click Create.
- Select the ad account and copy the pixel ID.
- Paste and save the pixel ID into the Pixel Manager.
- Optionally, enable automated matching in the Snapchat pixel.