When measuring the success of a campaign, it is crucial to be based on previously defined KPIs and goals. In this way, potential for improvement becomes visible early in the campaign planning and improved routines for upcoming projects are created. The measurement of success is also crucial for a comparison with other advertising measures. Since every company and every brand pursues individual goals, the KPIs and their weighting in influencer marketing can differ greatly depending on the project. The choice of platform also has an impact on the KPIs, especially in online marketing.