If you are not sure if the website you want to visit is safe, you can check it out here. Enter the address (url) of the website and see the invisible elements, such as a header or meta data.
site address:tpc.googlesyndication.com/pagead/js/r20171129/r20110914/abg.j...
favicon.ico:
site title:

Header

HTTP/1.1 200 OK
P3P policyref= htt???/www.googleadservices.com/pagead/p3p.xml , CP= NOI DEV PSA PSD IVA IVD OTP OUR OTR IND OTC
Timing-Allow-Origin *
Vary Accept-Encoding
Date Thu, 18 Oct 2018 10:26:48 GMT
Expires Thu, 01 Nov 2018 10:26:48 GMT
Cache-Control public, max-age=1209600
Content-Type text/javascript; charset=ISO-8859-1
ETag 2227995075384266592
X-Content-Type-Options nosniff
Content-Disposition attachment; filename= f.txt
Content-Encoding gzip
Server cafe
Content-Length 23555
X-XSS-Protection 1; mode=block

Load Info

page size72562
load time (s)0.026962
redirect count0
speed download873636
server IP216.58.208.193


* all occurrences of the string "http://" have been changed to "htt???/"