You can view the calls you’ve made, received, and missed in the Webex application by clicking the Calls option (telephone handset icon) on the left navigation bar.
If you see a red badge counter for any of the left-hand navigation options, e.g. Calls or Voicemail, this means that there has been recent/new activity in that section which you have not acknowledged or actioned. The number indicates how many new activities there are.
Once you have acknowledged or actioned all new items within that section the red circle will disappear.