This briefing note is intended for all managers in the health and social services sectors, as well as for public health actors who would like to see this type of approach established within their government so that health can be better taken into account in all policies. Those who are called upon to manage programs, projects or public policies involving multiple sectors with a determinant impact on population health will find here an overview of the usefulness of the horizontal (intersectoral) approach as compared with traditional approaches. This document presents the challenges and benefits specific to the horizontal approach, along with a summary of current thinking on the subject. It also includes examples of common practices tied to this approach. This approach should make it possible to better integrate health into all policies and to develop and implement healthy public policies. Managers familiar with horizontal approaches will find here an up-to-date review of current developments, as well as some avenues for reflection on their own management of horizontal approaches.