What is it used for? DNS lookups are not encrypted by default. This means that DNS can be used to monitor web pages that a user opens on the internet. In addition, since it is not encrypted, malicious users can exploit it for too many unpleasant purposes for the end user.
The DNS over HTTPS tries to address this issue by encrypting DNS lookups. It uses HTTPS for them and this means that lookups are more secure and private. So DNS lookups can no longer be used to monitor a user's activity on the Internet and malicious users can no longer handle their attacks.
Of course, like we mentioned a few days ago, the latest Windows 10 Insider Builds support DNS over HTTPS at operating system level. This means that all applications connected to the Internet will be protected.
Google has decided to implement the DNS over HTTPS in the Chrome without the need to interfere with an existing DNS settings of a system. Its use DNS over HTTPS in the Chrome is hardcoded in the browser.
THE Chrome continues to allow normal connections (non-encrypted) if problems are encountered with DNS lookups and will not use Secure DNS at all if parental controls are enabled on Windows systems or if certain Enterprise policies are set.
If you do not want to wait that long, do the following to enable the feature in Chrome now (restrictions still apply):
You may need to change the DNS servers on the device, as they should support Secure DNS. Google DNS, Cloudflare, Quad9 and Cleanbrowsing support Secure DNS.
Google plans to bring more Settings for the new feature. When he does we will see them at chrome: // settings / security. There is currently only one new option to enable or disable Secure DNS.