What on earth is DNS?
Every time you type a name like google.com, your phone or computer has to
translate that name into a number to find the site. DNS is that translator.
Think of DNS like a phone book lookup that happens in the background every time a page or app loads. Your internet provider usually does this for you automatically, so most people never notice it.
Why does that matter for security or privacy?
Each DNS lookup reveals which names you are trying to reach. If your DNS is unfiltered and
unencrypted, those lookups can be logged or observed. Example: a lookup to
sportsresults.com already reveals a likely interest, even before a page fully
opens.