What would be an example of an advertising campaign that uses Influencer Marketing?

https://martechseries.com/social/influencer-marketing/what-makes-influencer-marketing-platforms-so-exciting/ )

What would be an example of an advertising campaign that uses Influencer Marketing?

What potential ethical dilemmas did you discover, or do you believe have the ability to take place?

Influencer marketing is built on community and relationships. What guidelines, rules, or protocols do you believe should be in place to protect consumers from unethical influencer marketing?