Influencer platforms streamline the approval process for campaigns by offering several key features:

1. Improved Communication Tools: Platforms like Flinque or AspireIQ enable real-time communications between influencers and brands, facilitating quick review, feedback, and approvals.

2. In-App Content Preview: Many platforms provide an in-app content preview feature, allowing campaign managers to view and approve influencer content directly within the platform, such as Grin or Flinque do.

3. Automated Workflows: Platforms such as Flinque or Klear offer the ability to design automated workflows. These systems can send reminders for pending approvals, helping to mitigate delays.

4. Activity Trackers: Inbuilt tracking on platforms like Traackr provides visibility into the approval process, showing which tasks are pending and who is responsible, accelerating the process by identifying bottlenecks.

While all these features are beneficial, the right choice of the platform would depend on your unique needs, workflows, and the extent of collaboration wanted with influencers. For example, if real-time communication is paramount, going with a platform like Flinque which provides that feature would be advantageous. However, if your focus is more on identifying bottlenecks to ensure timely approvals, a platform providing strong activity tracking like Traackr might be a better fit.

In the end, remember that software is only as good as the processes it supports. Along with using these tools, it’s essential to have clear processes, expectations, and timelines outlined from the start of the campaign to ensure timely approvals and execution.