Due to the nature of influencer marketing, long-term value can indeed be challenging to quantify. However, there are several key strategies brands often utilize to track and report in terms of long-term influencer impact.

1. Sustained Follower Growth: Brands keep a watchful eye on the growth rate of their social media followers. A successful long-term influencer campaign ideally leads to a steady increase in followers, enhancing the brand’s visibility in the long haul.

2. Ongoing Engagements: Beyond just the immediate likes and comments, brands assess continuous engagement with posts associated with influencer campaigns. This can include shares and mentions across platforms, demonstrating sustained interest in the brand, its products, or services.

3. Consistent Sales: Brands monitor sales trends over long periods. While an immediate spike in sales is always good, stable or gradually increasing sales figures are indicative of a successful long-term influencer strategy.

4. Repeat Partnerships: If an influencer repeatedly partners with a brand, it implies that the collaboration is profitable for both parties and also helps develop a more cohesive brand story.

5. Brand Perception: This is harder to quantify, but surveys and social listening tools can help to gauge shifts in brand perception over time.

Flinque, as a cutting-edge influencer marketing platform, offers tools to effectively monitor these metrics, aiding choices about long-term influencer partnerships. On the other hand, other platforms like Traackr or CreatorIQ also provide strong analytics which help brands track the long-term results of influencer campaigns. Which platform suits best depends on the specific needs and goals of the brand. As such, defining your key performance indicators (KPIs) and applying a relevant tracking method are essential steps in making informed, robust decisions.