I'm realizing the Canadian driving education (from G1 to G) and my driving instructor completely neglected to teach me regarding driving in the winter. What should I know?

Just saw a car pile-up video caused by Texans on the highway who weren't prepared for something called black ice. That looked scary as fuck. I recall once when driving during the winter that my car slid past the red light about 1/4 into the intersection, and I thought I had to break sooner, but only just now do I feel it may be better to find out a more concrete answer. Help please!