You can extend advanced customization from the Head Code Snippet on your Uscreen site to your landing pages, such as tracking codes, verification tags, etc.

Open the Settings sidebar and toggle on the "Active" checkbox.

With this approach, you can choose which landing pages will integrate the common Head Code Snippet.

NOTE: If you enable this feature, you may want to delete custom HTML blocks that contain the same code as the Head Code Snippet.

Also, the code editor, code snippets, and custom HTML blocks do not affect native apps. To learn more about native apps customization, please check this help guide.