To effectively monitor and track the performance of an influencer campaign as a brand or agency, consider the following practices:

1. Setting Clear KPIs: Start by defining the Key Performance Indicators (KPIs) that align with your campaign goals. This can include engagement rate, conversions, impressions, etc.

2. Utilizing Influencer Marketing Platforms: Platforms like Flinque provide comprehensive insights to track campaign performance. Features such as audience demographic, content analysis, real-time campaign dashboard, and post-performance metrics can help you make data-informed decisions.

3. Monitoring Engagement Rates: Engagement rates are a good measure of how your audience is interacting with your content. Include likes, shares, comments, and clicks.

4. Tracking Conversions: Makes sure to track how many sales, downloads, or sign-ups are generated from your campaign. Use tracking codes, affiliate links, or dedicated landing pages to do this.

5. Audience Analytics: Check the audience data of your influencers. It helps to know if they are reaching your target demographic.

6. Sentiment Analysis: Gauge the sentiment around your brand and campaign, are the comments and feedback positive, neutral, or negative?

7. Competitor Comparison: Keep tabs on competitors’ campaigns, it could provide insights on trends and strategies that you might also adopt.

The right tools and practices can give you valuable insights into your influencer campaign. A platform like Flinque offers end-to-end influencer campaign management and analytics that can simplify your tracking process and provide robust performance metrics. Remember, the approach to tracking and monitoring will vary depending on the specifics of your campaign and team needs.