To track conversions on HubSpot-hosted pages in Google Ads, you can add a global site tag to the head HTML of your pages. To work with ads data primarily in HubSpot, connect your Google Ads account and install the Google Ads pixel instead.
In addition to the global site tag, you should add the event snippet to the head HTML of any thank you pages you want to track conversions for.
Please note: if you manually include the global site tag in your head HTML, you should not install the Google Ads pixel through HubSpot. Otherwise, the pixel will fire twice and may lead to inconsistent data.
In the left sidebar menu, navigate to Website > Pages.
In the Site header HTML section, paste the global site tag snippet. If you are already using a global site tag from Google Analytics, learn more about adapting it for Google Ads in Google's documentation.
Please note: all users can edit the head HTML of website pages. Only users in accounts with CMS Hub Professional or Enterprise, or Marketing Hub Professional or Enterprise, can edit the head HTML of landing pages.
Hover over a page and click Edit.
Click the Settings tab, then click Advanced Options.
In the Head HTML section, paste the event snippet.