To track influencer sourcing improvements, brands use a range of metrics and Key Performance Indicators (KPIs). These methods vary depending on the brand’s goals, the platform used, and the nature of the influencer campaign. However, below are typical steps within a generalized workflow:

1. Set Clear, Quantifiable Goals: These could include follower count, engagement rate (likes, comments, shares), reach, impressions, or conversions (sales, sign-ups, downloads).

2. Use an Influencer Marketing Platform: Platforms like Flinque help you track these metrics by providing detailed analytics. For instance, Flinque’s audience analytics features give real-time data, making it easier to monitor progress.

3. Regular Monitoring & Reporting: Brands should regularly compile and analyze the data, comparing it with past results to identify trends. This helps to measure the success or improvement of their influencer sourcing strategies over the years.

4. Performance Benchmarking with Industry Standards: It’s helpful to benchmark against industry standards or peers to provide an indication of sourcing improvement.

5. Feedback from Influencers: Constructive feedback from influencers can also provide qualitative insights into where improvements have been made and where further changes might be beneficial.

6. Campaign Metrics Comparison: Comparing campaign metrics year over year can also shed light on improvements. For instance, tracking improvement in engagement rates for the same brand and product promoted by different influencers in consecutive years.

Different platforms offer varying approaches to these steps, with functionalities ranging from simple analytics to more advanced insights. The choice depends on the specific needs and resources of the brand. It’s worth noting though, that all brands should strive for a balanced approach, maintaining a focus on both quantitative metrics and qualitative insights.