Both A record and PTR record are performing fundamentally important purposes. Let’s explain a little bit more about them.
A record
The A record is a popular and commonly used DNS resource record. Its primary duty is to connect the domain name to its corresponding IP address (IPv4). Therefore, every time a user types in its browser and desires to visit a certain website, it is going to need precisely the A record. Thanks to that, it is going to be able to reach it.
The A record contains inside the IPv4 address. It is a 32-bit address with 4 combinations of numbers, for illustration, 12.34.56.123.