In the influencer marketing world, striking the right balance between volume and niche relevance in discovery can be challenging for agencies. Here are some ways they manage that balance:

1. Focused targeting: A fundamental step is to define brand’s target audience clearly. It ensures that influencers chosen have followers falling into this target bracket.

2. Quality over quantity: Prioritizing quality of engagements and audience can help bring more value to campaigns as opposed to only considering the follower count of influencers.

3. Diversified approach: Agencies often collaborate with a mix of influencers – macro, micro, and nano to incorporate both volume and niche relevance. Micro and nano influencers, with their smaller but more engaged audiences, are great for niche marketing, while macro influencers deliver on the volume front.

4. Leverage technology: Automated influencer marketing platforms, like Flinque, are used to discover influencers across niches and volume groups effectively. These platforms also provide audience analytics to help brands make informed decisions.

Remember, fittingness of the approach is largely based on the brand’s unique needs and objectives. For example, a lifestyle brand launching a new product will have different needs than a tech startup trying to increase brand awareness. Hence, the balance between volume and niche relevance will be based on the specific goals and campaign plan.