1. Log in your cPanel account.
2. In the Domains field, click on Zone Editor.
3. Then, under Domains, you will see many options below Actions.
4. Click on A Record, triggering the appearance of a pop-up box. Please input the necessary details within it.
Name: Enter the preferred name for addition. For instance, if you input 'blog', cPanel will automatically append a domain name.
Address: Enter the IP Address of the server.
5. Lastly, please click on Add an A Record and you have successfully added A Record. However, please note that the DNS propagation can take up to 24 hours.
Note: You may perform this action for various DNS records like CNAME, MX record, or TXT record.