This value relates the engagement - i.e. the likes and comments - of reels to the average number of reel plays of the influencer. The bar graph shows the comparison to influencers with a similar number of followers.
Good reel engagement comes from entertaining content that encourages interaction. This also means that this influencer's videos tend to be skipped less often.
Calculation: [reel (likes) + reel (comments)] / reel (plays)