Do you know about micro-influencers?

Hello guys,

Recently I have found this term "micro-influencers", So When I searched about the term I came to know that micro-influencers are the credible and believable individuals who might have a very strong interest in a specific subject or expertise in a particular topic. Therefore they use to get engaged in communication about that particular topic or subject. These micro-influencers have followers count between 2000- 50000 in their specific social media channel and they have trust among their followers which help them to do influence marketing. But do you know how these micro-influencers boost business brands?