This text is displayed in the direction info - you could associate a location name rather than address if you wish, for example if I wanted driving directions to display ESRI Redlands and San Diego convention center instead of an address I could add an address attribute with the following information:
var fromLoc = new esri.geometry.Point( -117.194958859564,34.0573637535114,map.spatialReference);
routeParams.stops.features[0] = map.graphics.add(new esri.Graphic(fromLoc, fromSymbol,{address:"ESRI Redlands"}));
var toLoc = new esri.geometry.Point(-117.163797351249,32.7075263536336,map.spatialReference); routeParams.stops.features[1] = map.graphics.add(new esri.Graphic(toLoc, toSymbol,{address:"San Diego Convention Center"}));