Check the basics

• Ensure Do not disturb is not active.
  
  If you see  in the status bar Do not disturb is active and you will not receive notifications. Open quick settings and touch  to turn Do Not Disturb off
  
• To enable vibration for calls, go to Settings > Sound & vibration > Vibrate for calls and make your desired selection.
  
• To enable charging vibration when you insert a charger go to Settings > Sound & vibration > enable Charging sounds and vibration
  
• To enable touch vibrations such as haptic feedback or keyboard vibrations go to Settings > Sound & vibration > enable Touch vibration