What is DNS?
Domain Name System — the internet's phonebook that maps human-readable domain names to IP addresses.
When you type `inbuild.io` into a browser, your computer asks a DNS resolver for the IP address of that domain. DNS records (A, AAAA, CNAME, MX, TXT, NS) describe different aspects of how a domain resolves. Common gotcha: DNS changes take time to propagate — typically minutes to hours, sometimes 24+ hours globally. For an InBuild custom domain, you'd add a CNAME record pointing to `cname.inbuild.io`. Cloudflare and other DNS providers add caching, security, and edge logic on top of basic DNS.