Estimated Reach for Stories indicates the estimated number of people who are likely to see an influencer's story.
Since story view data is private and not publicly accessible, reach for stories is always an estimate by default. To calculate it, HypeAuditor uses the following metrics:
Followers
Average likes
If you receive the actual reach value directly from an influencer, it can be entered manually to replace the estimate.
Estimated Reach for Stories helps marketers assess the likely visibility of story placements within a campaign, enabling more realistic expectations and better comparison of influencers for story-based integrations. For a broader explanation of how reach estimates work across content types, see What is Estimated Reach?