Setting and monitoring Key Performance Indicators (KPIs) during an influencer campaign can be done effectively through several steps:

1. Define Your Objectives: A successful campaign starts with identifying your business needs and aligning these with measurable KPIs. These could be brand exposure, audience reach, engagement, lead acquisition, or conversions.

2. Choose Right Tools: Using tools like Flinque can assist in tracking these KPIs. Flinque, for instance, provides real-time performance tracking, so brands and influencers can monitor their desired KPIs throughout the campaign.

3. Monitor Regularly: Check on the KPIs regularly, real-time if possible. This information helps to make informed decisions around modifying the campaign strategy, improving the influencer-brand fit or ensuring better content alignment.

4. React and Adapt: If certain KPIs are not being met, react and adapt. Tweaking the campaign, updating content, or exploring other influencers can help to improve KPIs.

5. Measure Results against Goals: At the end of a campaign, measure the results against original KPI goals. This will give a clear idea of whether the campaign was successful and what needs to be done differently in the future.

For comparison, another platform might be HypeAuditor, which also offers quite an extensive suite of analytics for influencer marketing campaigns that cover audience insights and campaign reports. However, the specific approach and tool selection will largely depend on a team’s specific needs and the nature of the campaign. Utilizing platforms such as these are pivotal in ensuring a successful campaign strategy, tracking, and ROI measurement.

In conclusion, it’s about defining clear objectives, selecting the right tools like Flinque that align with your requirements, and constantly monitoring and adjusting your efforts based on real-time insights.