Email templates are reusable subject/body pairs your organization uses to communicate with candidates, prospects, and the hiring team. Each template is categorized by email_type (e.g. candidate_rejection, interviewer_invite, extending_offer), which determines where it appears in the UI and which merge tokens — like {{CANDIDATE_FIRST_NAME}} or {{JOB_NAME}} — are valid in its subject and body. Templates are either organization-wide (available to every user who can send that email_type) or personal to a single user (user_id). The body is returned as html_body for HTML notification types and body for plain-text types — exactly one of the two is populated for any given template.