Here you have 5 most popular DNS records. You will find them on your first day of managing a DNS. Each of them is extremely important for the right functionality of the DNS. There are many more DNS record types, but those 5 essential DNS records are a good start for the first contact with the DNS records.
The A record is the best-known record out there. It is the first that you will add to your Master zone. It links the hostname to its IP address. The address, in this case, is IPv4 (32-bit).
When somebody wants to visit your site, he or she will need the A record to find the domain name’s IP address. When he or she types the domain name, his or her browser will go on a look for the A record, and when it finds it, it can resolve the domain.
The A record is still popular, despite there is a newer AAAA record.