There are various types of DNS records with different purposes. The A record is the most common DNS record type and specifies the IP address which a Domain Name points to.

So that your browser knows which Web Server to connect to for your website your root domain will point to the IP address of the web server.

For example if your website is hosted on the cloud, it might have a DNS A Record which looks like: "examplewebsite.info A 91.208.99.12"