Assessing the engagement levels of influencers’ audience is critical to determine the potential efficiency of campaign outreach. Below are some key tactics:

1. Engagement Rate: Calculate this rate based on the average interactions (comments, shares, likes, etc.) divided by total followers multiplied by 100. Higher rates generally indicate more engaged audiences.

2. Audience Demographics: Look at the age, location, gender, and interests of the audience. An influencer with an audience that closely matches your target demographic is likely to generate better engagement.

3. Authenticity: Genuine interactions from followers often lead to higher audience engagement. Be attentive to an influencer’s content and the sentiments expressed in the comments section.

4. Consistency of Engagement: Analyze the consistent interaction levels over time. Spikes may sometimes be due to giveaways or paid partnerships, which may not effectively engage the audience long term.

There are influencer marketing platforms like Flinque, Klear, and Upfluence that provide extensive analytics which allow teams to scrutinize these metrics and make informed decisions on influencer selection. Flinque, for example, offers granular insights into the influencer’s audience, including demographics, engagement rates, and trending topics with their personas.

However, remember that each platform has distinct features and the best fit would depend on team’s specific needs and workflows. Nevertheless, understanding influencers’ audience engagement is the key to successful influencer marketing.