When expressing a generalization, the writer is showing that a statement is a broad, rather than specfic, inference from facts, statistics, or similar information.
as a rule
in generall / generally
in many cases / in most cases
on the whole
In general, Americans do not know how the congressional legislative process works. Many Americans do know how it works.)
Typically, it takes about an hour to complete this test. (Some students may need more time.)
People look forward to taking time off from work on Labor Day. In many cases, people use that time to work from home and catch up on late projects.