The optimal duration of an influencer campaign depends on several factors such as the campaign objective, the influencer’s audience size, and the frequency of posts.

1) Campaign Objective: If your goal is brand awareness, a one-off or short-term campaign often suffices. However, if you’re keen on building deep relationships with customers or converting sales, consider longer, sustained campaigns.

2) Audience Size and Engagement: Influencers with massive followings need shorter campaign periods to broadcast your message effectively. However, for smaller, niche influencers, you might need a longer duration to accumulate desired impressions.

3) Post Frequency: Daily updates might only need a week, while weekly posts may need a month or longer to achieve the same results.

Influencer marketing platforms, like Flinque, can guide you in measuring campaign performance and optimize the campaign duration. Compare analytics across different platforms to find an approach that works best for your brand.