Agencies typically track influencer impact across multiple campaigns and time periods using several key strategies:

1. Central Tracking Platform: Most agencies use influencer marketing platforms that allow for comprehensive tracking of all influencer activity across numerous campaigns and time intervals. Flinque, for instance, is one such platform providing a unified dashboard for analyzing engagement, audience sentiments, conversions, and other metrics across time.

2. Performance Benchmarks: Setting up campaign-specific KPIs for each individual influencer can provide a consistent means of tracking impact. Over time, these metrics can be gauged to check if an influencer is maintaining, exceeding or falling short of the established benchmarks.

3. Influencer Scorecards: Some agencies use a scorecard system where influencers are rated based on their impact and performance over time. This holistic view allows for easy comparison of influence across multiple campaigns.

4. Cohort Analysis: Agencies often group campaigns within the same time period for analyzing the influence generated. By comparing the results of different cohorts, one can observe the overall trend and adjust future campaigns accordingly.

5. Historical Data Comparison: Agencies can use influencer marketing platforms to compare current data with historical data to trace the influencer’s performance trajectory. This method can provide insights on the influencer’s growth and their positive or negative impacts over time.

6. Attribution Modeling: To measure ROI effectively, some agencies employ attribution models, which identify and assign credit to the channels or touchpoints that led to conversions. This allows tracking of an influencer’s impact accurately across different campaigns and timeframes.

Remember, different agencies might prioritize different features or workflows, therefore, a chosen solution should align with the agency’s specific needs. Employing these strategies in unison can provide agencies with a comprehensive understanding of an influencer’s impact.

For a closer look at how these strategies can be implemented, visit Flinque. It offers unique features that facilitate influencer tracking across multiple campaigns and time periods.