Determining the relevance of an influencer's audience can present several challenges. Here are some common hurdles you may encounter:

1. Limited Audience Insights: Influencers might not always provide detailed demographic information about their audience. They may not have access to audience insights on social media platforms, or they may not share specific details in their media kits or bios. Limited audience insights can make it challenging to assess the relevance of their audience to your target demographic.

2. Incomplete or Inaccurate Data: Even if influencers provide audience insights, the data might be incomplete or not entirely accurate. Influencers may rely on self-reported information or estimates, which may not reflect the true characteristics of their audience. Inaccurate data can lead to misjudgments when determining audience relevance.

3. Lack of Specificity: Some influencers may offer general information about their audience, such as age range, gender breakdown, or broad interests. However, this information might not provide enough granularity to determine if their audience aligns with your target demographic in a more nuanced way. Lack of specificity can make it challenging to make an accurate assessment.

4. Limited Engagement Analysis: While engagement metrics like likes, comments, and shares can provide some insights into an influencer's audience, they may not reveal the full picture. It's challenging to determine the relevance of an audience solely based on engagement metrics, as they don't provide information about the demographics or interests of the individuals engaging with the content.

5. Varying Audience Composition: An influencer's audience might be diverse and diverse in terms of demographics, interests, and preferences. While the influencer's content may be relevant to your target demographic, it's possible that only a portion of their audience aligns with your specific target audience. Determining the size and composition of the relevant segment within the influencer's audience can be challenging.

6. Audience Overlap: It's common for influencers within the same niche or industry to have overlapping audiences. This means that the followers of one influencer may also follow other influencers with similar content. Assessing the uniqueness of an influencer's audience and whether it provides incremental value compared to other influencers can be difficult.

7. Lack of Control in Surveys or Polls: Conducting surveys or polls within an influencer's audience can be an effective way to gather specific information. However, you may face challenges in ensuring a representative sample, as individuals who choose to participate might not accurately reflect the overall audience composition. Bias or limited response rates can impact the validity of the results.

8. Changing Audience Dynamics: Influencer audiences can evolve over time. As an influencer's content, interests, or platform preferences change, their audience composition may shift as well. It's important to consider the time period during which the influencer's audience data was collected to ensure its relevance to your current objectives.

When faced with these challenges, it's crucial to gather as much information as possible from various sources, use available data points as indicators, and make informed judgments. Consider a combination of qualitative and quantitative factors, and be prepared for some level of uncertainty when assessing the relevance of an influencer's audience to your target demographic.