The microflow names are those populated by using the ModelReflection module and should appear in the drop down list on the page you included. The names will look like Modulename.Microflowname
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EDIT: My initial answer above was wrong
In the CKEditor widget configuration (inside the modeler) there is a tab called Microflow Links. On this tab, enter the names of the microflow(s) that end users will embed in their text.
Once you've done that, in the CKEditor Viewer Widget configuration, there is also a tab called Microflow Links. This is where you choose which microflows are executed when an embedded link is clicked.