How will the US supreme court’s ruling on TPS affect 1.3 million immigrants?

Ruling is huge blow for residents with temporary protected status, many of whom have resided here legally for decades

The US supreme court dealt a huge blow this term to roughly 1.3 million immigrants in the US, many of whom have resided in the country legally for decades with temporary deportation protections that the Trump administration will now be able to end much more easily.

How does the justices' ruling affect these people and what happens next?