What is dns?
Domain name system, translates human redable web addresses like www.google.com to macine redable ip addresses like 22.214.171.124
Even when using a VPN, your DNS data can still be logged by isp and goverment
There are many instances of this https://en.wikipedia.org/wiki/Mass_surveillance_in_Australia https://en.wikipedia.org/wiki/Data_Retention_Directive
While this is a matter for the courts and many countries are in various stages of implementing and repealing these laws, what is collected is shared https://en.wikipedia.org/wiki/UKUSA_Agreement
There are various implementations of encrypted dns, the simplest, easiest, fastest implementation by far is currently cloudflare.
instalation instructions: https://126.96.36.199/
sorry i know its not up to wiki standards, but i just have no idea! exactly what to say...