What Does Address Record (A Record) Mean?
An address record (A record) is a DNS record which is used to point a domain name or subdomains to a static IP address. An A record specifies which IP is designated to a certain domain. This entry does not always have to be made; for example, a domain can be used exclusively for mail services, so an address record for this domain is not required.
Conversely, several records can be added for every domain. In such cases, a new record is returned for every query. This is particularly necessary for large scalable systems.
Techopedia Explains Address Record (A Record)
All servers that are connected to the Internet are designated a particular IP address. The address record associates a name to the server's IP address. This lets people to make use of easy-to-remember domain names instead of hard-to-remember IP addresses while connecting to a website. For example, users could type the IP address 18.104.22.168 in the address bar to access Google's home page, or they could effortlessly type www.google.com to access the page.
Users can set up A records using specific DNS management tools, which can differ among users.