social media as a self-branding device: the case of the fitness sectorHow the social media generation is changing the face of marketing? Show how the social media generation makes money through their work on social media and how companies use now these people to advertise their products/services. Compare old marketing and new marketing (social medias). Use a series of case studies (of the fitness sector) to complement the reflection. Identify and measure the impact of self-branding strategies.