Rigify addon does not do its job properly for my character I am new to the Rigify Addon. I have used it with my character, and it's not working well in some parts such as the face.



Link to the blend file 

Just give me some tips to improve my rig. You can also make some changes for improvement and share that.
Your face is working badly because your head hasn't a good topology. Search (even in this site) for Head topology and edgeflow, or start trying to copy this example of good head topology.