A wildcard domain is a DNS record that matches any subdomain under a specific domain. It is denoted by an asterisk (*) and is used to simplify the management of multiple subdomains by directing them to a single destination. For example, if you have a wildcard DNS record for *.example.com, any subdomain like blog.example.com, shop.example.com, or support.example.com will be directed to the same IP address or service.
This is particularly useful for applications that generate dynamic subdomains or for services that want to provide a consistent experience across various subdomains without configuring each one individually.
In the context of cloud services, platforms like Tencent Cloud offer DNS management services that support wildcard domains, allowing users to easily manage and route traffic to their applications hosted on the cloud.