Question

1) what does Good - niddance mocon?​

Answer 1

I think you are trying to ask : "What does Good - riddance mean?" . Answer of the question :

Riddance mean getting rid of something or leaving something. Good Riddance mean leaving something for Good reason. For example , if you stopped eating unhealthy food and ate healthy food , then you leave the unhealthy food for good reason and that is called Good - riddance.