Platform metrics
Share rate
Sends per reach — the normalised form of shares that lets a 50K-follower post compete with a 5M-follower one.
How INFLU measures it
Computed per post; consistently high share rate is a stronger breakout signal than a single viral spike.
Live example — Sportswear
Current Sportswear rankings → Sportswear leaderboard
Related terms
Shares
Sends and reposts of a post — the metric Instagram’s own leadership has named as a core ranking input.
Amplification rate
Shares and sends per reach — how often viewers pass content onward — the metric that captures distribution beyond the original audience.
Reach
The number of unique accounts that saw a post — the metric that actually describes audience exposure.