Here are a few key points about your target audience:
- Mass audience - As you noted, social media impacts nearly everyone in modern society. Most people are active users of at least one major platform.
- Broad age range - While younger generations may be more "native" users, social media is now integrated across demographics from teens to 40s+.
- Cross-cutting interests - The topic covers communication, technology, sociology, and more. It should appeal to people with a variety of interests.
- Relevance - Understanding social media is important given its pervasive influence on our lives and culture. People will want to learn more about how it shapes our world.
Focusing on such a mass audience