it more just, more equal, more fair, and safer for all.
There was a political party called the "Progressive Party," and it was founded by T. Roosevelt after he left the Republican Party (this was during the transition from the period from Lincoln's presidency through TR presidency when the Republican Party was the left wing party in the US to the period from FDR's presidency through LBJ's presidency by which time the Democratic Party had become the left wing party).
Government regulation over industry to impose safety standards, fair labor standards, environmental standards, etc. is a classic progressive goal (it is also -- by the way -- a socialist goal).
Classically, liberalism is a belief that the goodness of the individual is best advanced through the recognition of democratic processes, political freedom, and individual civil liberties.
The Bill of Rights is a classically liberal document.
Most often, liberalism and progressivism follow the same path, but sometime they don't. For example, gun control is a progressive goal but it is not a liberal goal.
If you want to shrink government, reduce taxes, and get the government out of the affairs of business, you are NOT a progressive.
If you want to create additional hurdles at the ballot box (by Jim Crow laws or their modern equivalents), shut down the Occupy Wall Street movement, and lock away Julian Assange and throw away the key, you are NOT a liberal.
If you are BOTH progressive AND liberal, you are probably a Democratic Socialist (don't worry, we have groups who can help you come to terms to this realization and help you come out to your family and friends).