In influencer marketing, the quality of discovery is primarily defined by the ability to filter influencers based on relevant factors. Here are the most effective filters in practice:

1. Audience Demographics: This filter allows you to discover influencers with audiences that match your target demographics, based on age, gender, location, and other variables. It’s integral in tailoring your message to the right audience.

2. Content & Category: Influencers often focus on specific niches or categories. Filtering based on content categories like fashion, beauty, tech, etc. can help you find those whose content aligns with your brand.

3. Engagement Rate: This filter helps you locate influencers with high-engagement rates. It’s a way to gauge how actively the influencer’s audience interacts with their content, which can potentially mean more visibility for your brand.

4. Follower Count: With this filter, you can find influencers with a specific range of followers to align with your campaign’s goals — whether you’re targeting mass awareness (macro-influencers) or niche engagement (micro-influencers).

5. Platform Presence: This allows you to find influencers who are active on specific platforms that align with your marketing strategy, such as Instagram, YouTube, Twitter, etc.

In comparison, influencer marketing platforms like Flinque offer these filters for a more focused discovery process. However, choosing the right platform largely depends on your specific business needs and marketing objectives. The effectiveness of these filters vastly improves when combined with a thorough understanding of the brand’s target audience and campaign goals.

Remember, influencer marketing is not a one-size-fits-all solution. The context, brand, platform, and audience vary widely for every campaign, and the best filters are those that help align these variables effectively.