# Step 1: Embed Surface Scripts Check out the [**How to Get Site ID**](/platform/traffic/surface-tag#where-to-find-your-site-id) page to get your site ID. ### Surface Tag [#surface-tag] Add the following script tag inside your `` tag: ```html ``` Using a verified custom domain? Add `data-custom-domain="forms.example.com"` to the Surface Tag. Follow the [custom-domain setup guide](/platform/traffic/custom-domains) before publishing the change. ### Surface External Script [#surface-external-script] Embed the script at the end of the `` tag: ```html ```