Layoff notice, what does the 60 days mean? (Pittsburgh)

Our team was told about a closure date that is 4 weeks away. There are 14 people counting on me, so I am trying to be careful. Some colleagues are already leaving. Should I stay for the bonus?

Thanks for writing this out. I went through something close to it last year, and it got easier once I kept a simple log of every call and form.

Start your search early. I wish I had begun the day of the notice.