Layoff notice, what does the 60 days mean?, home health aide here

My employer announced that the site will close and gave us written notice. This is my first time dealing with any of this. I do not know if I should start looking now or wait for severance news. Should I stay for the bonus?

Write down key dates and keep copies of the notice. Mine helped when a question came up later.

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