DrCoolGuy63 proxies are IP address that can be used to mask the requests between you and a server. Instead of displaying your IP in the records, it’ll display the proxies IP.
In computer networking, a proxy server is a server application or appliance that acts as an intermediary for requests from clients seeking resources from servers that provide those resources.
This is useful to get around usage limits, change your location, avoid IP bans, and lots of other usages. It acts similarity to a VPN in the sense that it’ll allow you to be anonymous.