Change in the US position on Israeli settlements in the West Bank

In November 2019, Secretary of State Mike Pompeo announced a change in the US position on Israeli settlements in the West Bank as explained in this BBC article:
https://www.bbc.com/news/world-middle-east-50468025 (Links to an external site.)

What is the change in position? Why are the settlements seen by many as illegal under international law? How will the change in US position affect the Palestinian-Israeli conflict? Use the course readings and research the controversy about the settlements.