The type of influencer involved in marketing campaign greatly impacts the return on investment (ROI). Here are the considerations:

1. Influencer’s Niche: aligning influencers with the right niche is crucial. It ensures the advertisement reaches the correct audience, which is likely to increase engagement and likely conversion rates.

2. Follower Demographics: it’s also important to consider the demographics of the influencer’s audience in terms of age, gender, and location. These factors need to complement your target market to ensure maximum reach and relevant engagement.

3. Influencer’s Engagement Rate: an influencer’s engagement rate is a good measure of their followers’ activity and interest. A high engagement rate generally indicates a more passionate and responsive audience, which can lead to better campaign results and ROI.

4. Type of Influencer: Micro-influencers usually have better engagement rates and a niche following, whereas macro-influencers reach a larger audience but might not have the same level of engagement.

For example, a platform such as Flinque can be useful in determining these factors as it provides details about an influencer’s audience demographics, interests, and engagement rate. Remember, different platforms offer different advantages – the key is to find one that suits your specific needs.

When planning a campaign, strategy should be tailored based on these factors. A campaign with a lifestyle influencer promoting tech gadgets may not produce a strong ROI because of the misalignment in audience interest. Similarly, working with an influencer who has a large following but low engagement might produce worse results than working with a smaller influencer who has high engagement.

In summary, the type of influencer chosen can greatly affect the ROI on influencer marketing. It’s imperative to look at the influencer’s specific demographics and engagement levels to ensure that there is an alignment with your brand and campaign objectives.