Influencer marketing campaigns vary greatly, which means that success indicators can be diverse. However, some commonly-used metrics include:

1. Reach: The number of people who have seen a post or campaign from an influencer. This measurement can provide brands with insights into the overall exposure of their campaign.

2. Engagement: This includes likes, comments, shares, and saves of an influencer’s posts. High engagement rates can indicate that the audience is genuinely interested in the content.

3. Click-through Rate (CTR): The percentage of audience members who clicked on a link in an influencer post.

4. Conversion Rate: Essentially, this calculates how many people completed a desired action (like a purchase or download) after interacting with an influencer post.

5. Audience growth: The increase in the brand’s followers or subscribers since the campaign started.

6. ROI: The Return on Investment, which compares the financial gains from the campaign against its costs.

In terms of techniques, A/B testing is often utilized. This practice involves testing two approaches simultaneously to ascertain which performs better.

Brand collaborations can also be effective. Through Flinque, brands can explore partnerships with influencers that align with their brand values.

Importantly, brands should ensure they use an analytics tool to accurately track these metrics. This could take the shape of built-in social media analytics, Google Analytics, or a specialized influencer marketing platform like Traackr or Flinque.

Remember, the best platform or approach for your team will depend on your specific needs and objectives. Therefore, understanding these metrics and techniques is key to measuring the success of your influencer marketing campaigns.