You use REST endpoints exposed at /gsadmin/v1/cloud/content/additionalContent/TriggerName to define an additional content item, or a trigger. You can have this trigger either on a search term or on a navigation state, that is, using dimension value IDs.

Example: Rule trigger definition

You can use the following call to create a new additional content item to trigger on a search for “about us”.

POST /gsadmin/v1/cloud/content/additionalContent/aboutus
{
  "ecr:type" : "content-item",
  "priority" : 10,
  "contentItem":
   {
      "@type": "UnstructuredContent",
      "title":"Looking for information about our company?",
      "link-title": "About Us",
      "link-url": "/about-us",
      "image": "company-logo.png"
   },
  "triggers":[
   {
      "searchTerms": "about",
      "matchmode": "MATCHEXACT"
   },
      {
      "searchTerms": "about us",
      "matchmode": "MATCHEXACT"
      }
  ]
}