Microphone registers and discovers Web APIs and REST services with Consul

i got it from this url http://www.hanselman.com/blog/NuGetPackageOfTheWeekMicrophoneRegistersAndDiscoversWebAPIsAndRESTServicesWithConsul.aspx

but just do not understand what is it ?

what is relation with micro phone and web api. if some one read the write up from the link i given and understand what it is then please share the knowledge with me like what is it and when it will be used.

thanks