How to use "ain't nothing"?

Native speaker’s answer
Rebecca
"Ain't nothing" is an informal way of saying "it isn't anything." Here, the speaker says it to minimize the issue, to say that the app's routing issues will not stop her from completing her work on time. Ex: Ain't nothing to worry about. (It isn't anything to worry about.) Ex: Ain't nothing I need to do today. (There isn't anything I need to do today.)