How to Block ad’s while playing game, watching video .. etc. without installing any software and browse free.
In Android 9 pie + latest versions.. google introduced a new option called private DNS which is simply dns over transport layer security (DNS over TLS)

open,
Settings => Network and Internet => Private DNS => Private DNS Host Name
Then, Enter any of the following dns.adguard.com
family.adguard.com
// blocks adult content also ads-dot.securedns.eu
dot-fi.blahdns.com
dot-jp.blahdns.com
dot-de.blahdns.comadblock.any.dns.nixnet.xyz
adblock.lv1.dns.nixnet.xyz
adblock.ny1.dns.nixnet.xyz
adblock.lux1.dns.nixnet.xyzdns.quad9.net
// block some ads and malicious domains family-filter-dns.cleanbrowsing.org
// safe browsing block all adult , phishing content