Boolean algebra is the algebra of logic, which deals with the study of binary variables and digit logical operations.
In ordinary algebra, the letter symbols take any number of values. In Boolean algebra, they take two values( i.e. 0 and 1). The values assigned to a variable have numerical significance in ordinary algebra,
Whereas in Boolean algebra they have logical significance.
What is boolean algebra usually applied to?
it is usually applied for operation on logical value.