Build Basics / Standard term
Domain name
A name in the Domain Name System, such as example.com, whose DNS records direct clients toward services and other records.
A registrant obtains the right to use a domain through a registrar for a renewable term. DNS records can point to IP addresses, other domain names, mail servers, verification values, and more. A browser may pass through a content-delivery network, load balancer, or hosting platform rather than contact one fixed machine.
Builder example
A domain can provide a stable public name while infrastructure changes underneath. Trust also depends on TLS, content, sender reputation, and correct ownership; a memorable name alone does not make a service credible or secure.
Common confusion: Registering a domain does not deploy an application, and changing DNS does not move the underlying files. It changes how clients discover the service after caches update.