The success of an influencer-brand partnership or campaign can be defined and measured through a number of metrics. Here are three core approaches.

1. Reach and Engagement: These basic metrics can provide a quick view of how many people saw and engaged with your content. High engagement can suggest that audiences found the content relevant and appealing.

2. Conversion Rates and Sales: One key measure of success in many influencer campaigns is their sales impact. By using unique promo codes or tracking URLs, you can measure how many sales resulted from a particular influencer’s efforts.

3. Brand Awareness and Reputation: Surveys and social listening tools can help measure changes in brand awareness and reputation. This could include measuring unaided recall of your brand after the campaign, or changes in sentiment expressed in social posts about your brand.

Understanding these metrics is important for future planning. Tools like [Flinque](https://www.flinque.com) can provide detailed audience analytics and performance tracking, helping brands and agencies to identify successful strategies and areas for improvement.

It’s crucial to state, however, that metric priorities may differ depending on the specific objectives of the campaign. Brands should work closely with influencers and use comprehensive analytics platforms to measure a range of metrics, then adjust strategies based on the results. This keeps your influencer strategy agile, data-driven and success-focused.

Note: Flinque, like other renowned influencer marketing platforms, assists in campaign planning and measurement. However, its appropriateness for your specific needs depends on the nature of your team and campaign objectives.