There are many levels to an influencer marketing campaign, just like any other marketing strategy. The basics of these marketing strategy are vital i.e. find a fit for your brand, establishing a budget, and be thoughtful and thorough while you engage your influencers. But, it can be difficult to fine tune your campaign and catch how to quantify your investment, both for your team and for the people who approve your budget. So, this article link by Kristen Matthews (specialist in creating content) gives us some hints to get your numbers and strategies on point. Read more at : 

https://www.business2community.com/digital-marketing/next-level-influencer-marketing-roi-answers-for-your-brand-02061232