What can be gained by using caching-only DNS server?

Using a caching-only DNS server can significantly improve the speed and efficiency of DNS queries by storing previously resolved domain names and their corresponding IP addresses. This reduces the need to repeatedly query external DNS servers for the same information, resulting in faster response times for repeated requests. Additionally, it can help decrease overall network traffic and lower the load on upstream DNS servers. Overall, it enhances user experience by providing quicker access to frequently visited websites.