Layoff notice, what does the 60 days mean? after 3 years as a barista

My employer announced that the site will close and gave us written notice. I have read a lot of threads here and could not find my exact situation. They offered a retention bonus for people who stay. Should I stay for the bonus?

Keep everything in writing and save the confirmation numbers. It saved me later.

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