When analyzing my nginx access.log on my linux server i found, that there are tons of requests made by mobile devices with referrer m.facebook.com..
But there are not that many visitors on my site (according to google analytics)..
Does anyone know where this requests come from and why they are not logged in analytics?
This is one entry in the access.log which seems to be suspicious:
xx.xx.x.xxx - - [11/Aug/2016:15:51:20 +0200] "GET /skimagazin/wintereinbruch-in-den-hochlagen-oesterreichs-und-deutschlands.htm HTTP/2.0" 200 12445 "http://m.facebook.com/" "Mozilla/5.0 (Linux; Android 5.1.1; SM-G800F Build/LMY47X; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/52.0.2743.98 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/89.0.0.17.70;]"