An influencer is someone who has:
• the power to affect the purchasing decisions of others because of his or her authority, knowledge, position, or relationship with his or her audience.
• a following in a distinct niche, with whom he or she actively engages. The size of the following depends on the size of his/her topic of the niche.
It is important to note that these individuals are not merely marketing tools, but rather social relationship assets with which brands can collaborate to achieve their marketing objectives.

What Are Social Media Influencers?
Over the last decade, we have seen social media grow rapidly in importance. More than
3.4 billion
people actively use social media – that’s 45% of the world’s population.
Inevitably these people look up to influencers in social media to guide them with their decision making.
Influencers in social media are people who have built a reputation for their knowledge and expertise on a specific topic. They make regular posts about that topic on their preferred social media channels and generate large followings of enthusiastic, engaged people who pay close attention to their views. Brands love social media influencers because they can create trends and encourage their followers to buy products they promote.