This study examines the transformative effects social media has made on marketing strategies to many variables. With the emergence of sites like facebook.com, instagram.com, twitter.com, linkedIn.com, and tik-tok.com, companies and organizations have shifted from their historic forms of marketing to more engaging, dynamic, and consumer-centric forms of health promotion and marketing strategies. This paper evaluates the impact of social media on developing brand awareness, targeting and engaging customers, and assessing the purchasing behaviours of consumers of brands and services, but also outlines the methods and benefits of use in paid social media advertising (targeted advertising, influencer marketing). The study is based upon a response of using quantitative and qualitative research practices/ techniques (surveys, expose case studies and data analysis) to determine various key trends, benefits and pitfalls associated with leverage social media advertising as part of a health promotion or social marketing strategy. The combination of research findings indicated to the study that social media offers huge opportunities for immediate engagement and can provide a whole new level of engagement using data-driven points of view. However, it invites brands to constantly innovate and respond to consumers. The research also provides evidence that a good social media marketing strategy is now essential for businesses who want to remain competitive and secure long-term growth, profit, and competitive advantage moving into an increasingly digital era of using social media for promotion, marketing, and advertisement.