Brands and agencies can continuously assess the performance of an influencer during a campaign through several methods. These include:

1. Tracking Engagement Rates: Monitoring likes, comments, and shares on the influencer’s posts can indicate how engaged their audience is with the content. High engagement rates often translate to higher campaign success.

2. Analyzing Audience Demographics: Some platforms like Flinque and others provide detailed analysis of the influencer’s audience demographics such as age, location, interests. This ensures that the influencer’s followers match with the brand’s target audience.

3. Keeping Tabs On Conversion Rates: Conversion rates show how many followers completed the desired action (purchased a product, signed up for a newsletter, etc). Flinque’s platform, for example, records and measures the number of conversions generated from each post.

4. Reviewing Content Quality: The quality of the content posted by the influencer should align with the brand image and campaign objectives.

5. Using UTM Codes and Pixel Tracking: Both are insightful ways to track the performance of a campaign by showing the influencer’s impact on the website traffic, customer journey, and sales.

Overall, the tool or approach a brand chooses to evaluate an influencer’s performance during a campaign should depend on the campaign objectives and the brand’s specific needs. It’s important to leverage a combination of these metrics to get a complete picture of an influencer’s performance. Campaign tracking features offered by platforms like Flinque can simplify this process by providing consolidated views and insightful data at a glance.