This performs the same function as entering the IP addresses manually except it means your DNS requests are encrypted for some extra security (it makes MITM attacks more dif***ult which is good for security, but doesn’t necessarily provide privacy as TLS leaks the target domain name).
There are other router settings that are worth changing to provide extra network security. It is also rare for ISPs to provide frequent and timely updates to routers, and running outdated software on a router is high risk as the router is at the edge of your network and protects the devices within your LAN.
This means all DNS queries from within your LAN go through your own local DNS server, not a remote server, and you can customise the block lists - for example if you hate Facebook you can block all Facebook domains from working in your LAN. Zoom's tattle-tale attention-tracking feature can tell your meeting host if you aren't paying attention to their meticulously-composed visual aids.
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