Quad9 is a free service that replaces your default ISP or enterprise Domain Name Server (DNS) configuration. When your computer performs any Internet transaction that uses the DNS (and most transactions do), Quad9 blocks lookups of malicious host names from an up-to-the-minute list of threats. This blocking action protects your computer, mobile device, or IoT systems against a wide range of threats such as malware, phishing, spyware, and botnets, and it can improve performance in addition to guaranteeing privacy. The Quad9 DNS service is operated by the Swiss-based Quad9 Foundation, whose mission is to provide a safer and more robust Internet for everyone.
Why would it matter for a gaming laptop or PC? Well the emphasis is on performance. The faster the DNS response, the lower the server ping and latency in games.
While I would recommend Quad9, you may not have heard of them from Adam. There are alternative secure DNS service providers too like Cloudflare, OpenDNS (CISCO) and Google for example. So there's plenty of choice and finding one that works fastest for your location is the key here.
Find out more about Quad9 and how to configure Windows Network Adaptor settings and also add them as DNS over HTTPS provider in all browsers (copy and paste the https address for the latter in the browser settings as a custom provider, it's dead simple): https://www.quad9.net/