If want to know that who is stalking you on the Facebook then through this post you will know who's stalking or visiting your profile the most.
Step 1:- Go to "play store" app. and download the app " Profile tracker - Who viewed my Facebook profile".
Step 2:- Install it. Now open the app. And The benefits of this app will be shown to you.
Step 3:- Click on the option "Continue with Facebook" and login to it. Now you can see who has visited the most or react to your posts even though he is a complete stranger.