I need help here

Where I come from, left or right or centre refer to relative geographical positions depending on where someone is standing but I think those words mean entirely a different thing in the “west”( I have it quotation marks as a way of asking west of what?)

So I was listening to this video and there is talk of regressive left, alt-right and woke left that has left me confused.

So here is the question, assume you’re explaining to a child and tell me the difference between the right, alt-right, leftist and regressive left.

Thank you