There are various elements that make up an effective eComms surveillance system, it should capture all channels used including messaging and video applications. It’s output should be reviewed frequently, if not daily then at least weekly.   Any channels you are not able to capture should be clearly prohibited for use by employees. Alerts should be derived from a tailored lexicon to ensure that false positives are reduced. Other elements of effective surveillance will include management reporting, governance oversight, clear policies, and staff training.