Reach: the number of individuals reached by influencers during a campaign.  
Impressions: the number of times a piece of content is displayed. 

  • Posts impressions are estimated based on the number of likes of the post x 10

  • Stories impressions are estimated based on the influencer's average number of likes x 5

  • Engagement rate: it indicates how close to the community an influencer is. Lefty calculates this by dividing the number of likes by the number of followers. 

In a report, Lefty compares the campaign engagement rate to the influencers' average engagement rate to measure the campaign's performance. 


EMV: The Earned Media Value transforms the value created by influencers' publications and estimates the price of an equivalent paid media campaign on Instagram.
EMV is calculated based on the number of estimated impressions and a default CPM of $15.

EMV formula: Impressions x CPM / 1000
We use a CPM of $15.

To view Lefty's complete list of KPIs explained, click here.

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