Three complementary approaches to the concept of service are described in this article. A) services rendered to a service users that result from the person’s wishes, rights and the quality of care offered, B) services in the community taking the form of mobile teams working in homes and in the ordinary environment of the person, C) services managed from a single platform comprising several agencies offering a variety of forms of care, thus enabling people in vulnerable situations to benefit from a continuity of care. In this last case, several legislative and administrative measures and methods will be necessary to make service users’s itineraries more joined-up by a better articulation of each segment of their care programs.