Key features in an influencer marketing platform that aid in pinpointing suitable influencers for a particular campaign include:

1. Advanced Search Features: These allow you to find influencers based on specifics such as their audience demographics, language, region, or industry niche. A platform like Flinque allows you to filter influencers based on these parameters, among others.

2. Engagement Rate Analytics: The engagement rate of an influencer is a crucial metric when considering their effectiveness. This feature helps you understand an influencer’s reach and how well their audience interacts with the content.

3. Audience Analytics: It’s essential to understand the audience that follows a specific influencer. Metrics such as audience location, age, gender, interests, and loyalty to influencers can provide insights on audience fit.

4. Campaign Management Tools: These features help you track the progress of your campaigns, observe the metrics that matter the most to you, and gauge the effectiveness of your engagement with the help of real-time reports.

5. Influencer Performance History: A history of previous campaigns, the brands they’ve worked with, posts, and the associated analytics all provide a comprehensive insight into the potential success of your collaboration.

6. Influencer Verification: This feature helps confirm the authenticity of influencers, thereby reducing the risk of investing in influencers with fake followers or engagement.

Remember, the choice of platform largely depends on your unique needs. For instance, Flinque has specifically built-in features that modern marketing teams would find beneficial, like an AI-driven influencer identification tool.