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:pixel.quantserve.com/pixel/p-28xNXCahEGEk2.gi...
Url ContentGraphics Interchange Format
MIME Type / Internet Media Typeimage/gif
MIME Type image
File Extension.gif
More Details (link to:)Wikipedia: Graphics Interchange Format
Powered by: Very Tiny URL Shortener at https://vturl.net VeryTinyURL

Header

HTTP/1.1 200 OK
Connection close
Content-Type image/gif
Set-Cookie mc=5a8af182-c6e12-65b31-7aa58; expires=Fri, 22-Mar-2019 15:47:14 GMT; path=/; domain=.quantserve.com
P3P CP= NOI DSP COR NID CURa ADMa DEVa PSAo PSDo OUR SAMa IND COM NAV
Cache-Control private, no-cache, no-store, proxy-revalidate
Pragma no-cache
Expires Fri, 04 Aug 1978 12:00:00 GMT
Content-Length 35
Date Mon, 19 Feb 2018 15:47:14 GMT
Server QS

Load Info

page size35
load time (s)1.345546
redirect count0
speed download0
server IP64.95.202.59


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