Splash pages are designed to be visible each time the interpreter or requester logs in. Customize them how you need in Agency => Settings.
In Settings you'll find two entries. "Interpreter Splash Page" and "Requester Splash Page".
Enable splash pages by switching on the Active Switch.
To format the splash screen content type anything you want in the text boxes. When you want something specific to the customer or agency to be displayed copy the brackets with the word within.