authorized shares is like the credit limit on a credit card. For example you might have a credit card with a $5000 credit limit. That's the most you are allowed to spend. Your balance on the credit card the money you owe might be $1000 but your limit max you can borrow is $5000.
Same concept, WDAS credit limit, authorized shares they are allowed to issue is 5 billion shares. Right now WDAS has 1.7 billion shares issued and another 2 billion shares owed for the preferred a and c shares when they are converted into common shares.