Ads appear in most of the Free Apps available in Google Play Store Now a days. Most of the websites are also full of popups and other kinds of ads. This hosts file helps in blocking most of such Ads easily.
Instructions -
1 ) Download The Hosts File from Here.
2) Now open a ROOT File Explorer and browse to /system/etc .\
3) There you will find a hosts file.
4) If you have previously added any entries to the file, rename the hosts file as a hosts.bak file.
5) Now, paste the downloaded Hosts File there.
6) Open hosts.bak file in text editor and copy the entries you may have previously made and paste it into the new hosts file.
7) Reboot Your Phone. Done!