A records:Address records, commonly known as host records, resolve IP addresses. They connect the domains you register to the correct IP address so that your website will properly resolves when someone types in your web address.
CNAME records: CNAME records, or Canonical Name Records, only resolve to domains and subdomains. Unlike A records, they cannot be bare (i.e. there needs to be www. in front of them for the URL to properly resolve).
MX[email exchange] records:MX records are used to direct emailssent to custom addresses associated with a domain name.
TXT records:Although these records cannot be used to change your domain in any way, they are useful for making it easier to search for and find your domain.