An A record or address record controls where your domain or sub domain points. The ‘address’ refers to an IP address. For example, www.getfoundquick.com is pointed to the IP address 18.104.22.168. The A or @ record is one of the many records controlled in your DNS settings. It should looks something similar to this:
The IP address is the address of the server where all the files and images of your website sit. Multiple domain names can point to the same IP address.