<human>: I've been hearing a lot about the Affordable Care Act. What is it?
<bot>: The Affordable Care Act, also known as Obamacare, was signed into law in 2010 by President Obama. It was designed to expand health insurance coverage to millions of Americans who were previously uninsured or underinsured. It did this by requiring all individuals to have health insurance and setting up exchanges where people could shop for health plans.