Brands and agencies can measure an influencer’s impact on their public perception by tracking key performance indicators (KPIs). Here are some methods:

1. Sentiment Analysis: Platforms like Flinque have automated sentiment analysis tools. These examine social comments and messages regarding the brand, before, during, and after the campaign, to gauge public sentiment.

2. Brand Mentions: Track the number and nature of brand mentions generated by the influencer’s posts and engagements.

3. Engagement Metrics: Look at likes, comments, shares and views on the influencer’s content about your brand. This could reveal how the public has engaged with both the influencer and your brand.

4. Website Traffic: If provided, you can analyze the traffic from the influencer’s content to your brand’s website using analytics tools.

5. Sales Conversion: With the help of UTM parameters or unique promotional codes, it’s possible to track how many users made a purchase from the influencer’s referral.

6. Surveys and Polls: Post-influencer campaign, conducting a survey or poll helps to gauge changing perceptions about the brand.

Different influencer marketing platforms provide various tools and metrics for these types of measurements. For example, at Flinque, we offer detailed post-campaign analytics and reporting features, enabling brands to track the success of their campaigns across multiple dimensions.

Remember, it’s not solely about the numbers, but how these numbers translate to your specific campaign goals. It’s also crucial to remember that the impact on public perception may not be immediately apparent and could take time to fully appear.

Every brand and campaign have different benchmarks and indicators of success, so choosing the right platform and metrics to track depends greatly on your unique needs and objectives.