Hello there! Influencer marketing can be used in many different ways today. I think an easy way to look at it is... "who are the people or accounts that my target customer/persona etc. are following, sharing content, and engaging with the most and how can I build relationships with these people?" By building relationships with and engaging with these "influencers" you have the opportunity to broaden your reach and hopefully they will share your messages to their followers who likely fit your target market. Another benefit to having "influencers" share your content is that oftentimes people will listen more intentionally to people they know and trust. That's why if an influencer is sharing your content and their following is in your target market you are trying to reach, then it is a great way to get your message in front of the right people!
Back to your original question, I agree with Meisha. As long as there is a person behind the account and that account is being followed by your target audience, it might make for a great influencer partnership!
Hope this helps!