With the widget service time you control how your Chat Widget behaves outside of your service hours. You can hide the chat button, for example. Or if you make use of Chat Butler, you can prevent it from showing up when your chat isn't staffed. This way you don't create false expectations for your web visitors.
Now we've expanded this feature by adding service times per day. Maybe you don't offer chat support on, say, Sunday's. Now you can process that in your Chat Widget, as well as your fixed service times for all other days of the week.
Check out our full feature update here.