"Essentially, DNS turns domain names (such as ZDNET.com) into an IP address so web browsers and apps know where to get the information you want. Without DNS, you'd have to type 34.149.132.124 every time you wanted to go to ZDNET.com or 74.125.21.102 to go to Google.com. Even by simply running a Google search, DNS is at work. The problem is that standard DNS isn't encrypted, meaning all your queries are sent over the network as plain text."
"Let's say you're on a public network -- like a coffee shop -- and you start searching for things on your Android device. Or maybe you have to access a CMS or another work tool, and you don't want the public to know the address you're typing. If someone else is on the same network and has the skills, they could intercept your non-encrypted search queries (or the URLs you visit) and know exactly what you're looking for."
"That's where Private DNS mode comes into play. Once you enable this feature, all of your DNS queries are encrypted, so bad actors won't be able to view them -- even if they capture those packets. In other words, Private DNS mode should be an absolute must for anyone who values their privacy and security. But how do you enable Private DNS mode on Android? It's actually pretty simple. Let me show you how."
DNS translates domain names into IP addresses so browsers and apps can locate resources. Standard DNS sends queries as plain text, allowing observers on shared networks to intercept search terms and visited URLs. Public Wi-Fi environments amplify this risk, exposing CMS addresses and other sensitive lookups. Private DNS mode encrypts DNS queries, preventing ISPs and attackers from viewing them even if packets are captured. Enabling Private DNS on Android improves privacy and security and is straightforward on Android 11 and newer, although the method for configuring it changed. Disabling Private DNS removes these protections and exposes DNS traffic to interception.
Read at ZDNET
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