While I didn't try to insert tables (I didn't need it), I was able to type text. You can insert a text box (similar to bluebeam or aCAD) and type in with your keyboard. You can also draw with your mouse. There is the possibility to either delete what you have written (typed), or simply erase the whole white board.
Training for Project Management Professional (PMP)®, PMI Agile Certified Practitioner (PMI-ACP)®, and Certified Associate in Project Management (CAPM)®