The A Record points your hostname to an IP address. This is one of the most frequently used records in the DNS Zones and it is an essential part of your DNS configuration. Record A specifies the IP address (IPv4) for a given host. In other words, it resolves a domain name (or points the domain name) to the correct location by means of the IP address.
The DNS A record has the following look,
Why do you need an A record?
Let say you have a website. That site is hosted on a web server with the corresponding IP address for it. You also have purchased a domain name for your site. Now you need to link them. And here is where the A record comes. It simply maps your domain to your server’s IP address.