What is the meaning of Influencer?

A person who or a thing which influences.

A person who is able to influence consumption, lifestyle, or political preferences of their online audience by creating or engaging social media content, often as a part of a marketing campaign.

influencer

influence (to exert an influence upon)

influencer (person who is able to influence consumption, lifestyle, or political preferences of their online audience by creating or engaging social media content, often as a part of a marketing campaign)

influencer (influential person on social media)

influencer

Source: wiktionary.org