Anyone who can influence a set of people is an influencer. Social media influencers, through their online presence and authority, have the power and ability to affect purchasing decisions of their followers.
The online space is huge, competitive and with immense potential. Today there are specific agencies that segment themselves in being a Instagram influencer agency, or an youtube influencer agency or a global influencer agency if their presence is worldwide. The influencer is someone who is recognised by others and has a loyal follower base, and exerts influence through their ability to connect with others for brand awareness, visibility or sales.