Smart Alerts and Motion Sensitivity for camera in app

Hello! I have a hard time interpreting the settings in the app. After the latest update of the app, I have received "Smart Alerts" at the camera settings in my alarm. There you can choose "Person" or "Other motion", I have chosen "Person".What I do not really understand is when I go to "Motion Sensitivity" under "Motion Settings" - there are four choices from min to max, but there is no text about what each step means. Do these settings even affect the app settings because I have selected "Smart Alerts"?The slider under "Motion Sensitivity" does not change when I select "Smart Alerts" on or off.