Ignoring that every time I read DoH as "Doh!" and not DNS over HTTPS, this is still a useful tip from Tantek. A reminder that it's easy for the router to see what's happening.
By using DoH exclusively, every one of those domain names is sent only to your DoH provider (e.g. Cloudflare or NextDNS) blocking your local router, WiFi, and internet service provider from making a list of which websites you visit, or at least making it much harder