A business metric should be measured against a target. A KPI should measure the success of achieving that target. Got it? Good. Let’s look at the KPIs worth tracking for your social media. Social media KPIs for reach. How many people might see your posts across all of social media? Say you have a Facebook profile 300 people like.
https://blog.hootsuite.com/social-media-kpis-key-performance-indicators/

