As @Amelia_Waliany & @arunk19034797 have pointed out a Target native metric would be more like activity entries etc. Visit is more of an Adobe Analytics concept. A visit is a 30min session. This is touched on in this KB article: https://docs.adobe.com/help/en/target/using/activities/success-metrics/success-metrics.html
Mihnea Docea | Technical Support Consultant | Customer Experience | Adobe | 1 (800) 497-0335
