You or your clients can comment on individual Client Tasks to instantly communicate in context.
To add a comment to a Client Task, add your text in the yellow box that will appear when an individual task is expanded.
As soon as you add a comment, your client will receive an email, or if they have their Client Task view open, they'll see your comment instantly.
Your client can respond with questions or comments of their own against any Client Task, in the same way you can. You'll be able to see any client comments against a task instantly, and to make sure you don't miss anything, you'll also be notified in Triage