© Oxford University Press, 2010. All rights reserved. E-health is a term that encompasses the use of new information and communication technologies for improving health and health care. Sometimes the scope of e-health is restricted to web-based tools, but with the increasing convergence of networked technologies across multiple platforms, such as mobile telephony or interactive digital television, a broader definition is more helpful to include initiatives which may perhaps use mobile or pervasive technology. This chapter describes the emerging area of e-health promotion, identifies the scope of this field, and discusses the opportunities and challenges that it presents.