Using a web conference service can improve your sales process. When you have a sales proposal to make, a web conference service can put you virtually in front of your audience to make your presentation regardless of where the conference participants are located.Web conference call involves the feature of audio and video the presenter or the calling party shares the screen of its computer with other participants so as to enable them to see what is on its screen. The audio part is accompanied to this screen through telephone equipments or VOIP.