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:pagead2.googlesyndication.com/pagead/js/lidar.j...

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 *
Date Mon, 19 Feb 2018 01:50:32 GMT
Expires Mon, 19 Feb 2018 02:50:32 GMT
Content-Type text/javascript; charset=UTF-8
ETag 17747629965694614975
X-Content-Type-Options nosniff
Content-Disposition attachment; filename= f.txt
Content-Encoding gzip
Server cafe
Content-Length 28961
X-XSS-Protection 1; mode=block
Cache-Control public, max-age=3600
Age 1907

Load Info

page size28961
load time (s)0.002539
redirect count0
speed download0
server IP216.58.204.98


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