Once you have your Google Tag Manager (GTM) account and tags set up, you need to copy the embed code to your individual landing pages. This is necessary for any kind of GTM tracking, including managing cookie consent on your pages.

1. Copy your GTM tracking code
   (There will be two sections: one for page head, another for page body)
2. Edit the relevant Landing Page
3. From the right side panel in the Design tab, click Edit JavaScript
   
   
4. Add head portion of your GTM container code to the text box, then click OK
5. Insert the custom content block at the top of the landing page
6. Add the body portion of the GTM container code
7. If you are using GTM for cookie management:
   • Select Edit Page Properties and enable Don’t Cookie Visitors
     
     
     
     
8. Save the Landing Page 

Remember to repeat these steps for all necessary Landing Pages.