WinRAR Wizard interface is designed for novice users and allows to perform basic compression and decompression operations using the simple step by step procedure.
You need to press "Wizard" button on WinRAR toolbar to display the wizard dialog. By default this button is visible both inside and outside of archives, but you can disable or enable it like other toolbar buttons with "Select buttons…" in Interface settings dialog. Another option in the same "Interface settings" dialog, "Activate Wizard on start", allows to run Wizard every time when WinRAR starts.
Every Wizard dialog contains a brief instruction at the top, describing dialog contents and possible user actions. You can also press Help button to get more detailed instructions.