Is 100% bounce rate good?

Excuse me, but could you please clarify something for me? I've come across the term '100% bounce rate' in the context of website traffic, and I'm not entirely sure what it means or whether it's a good thing. Could you explain what a bounce rate is, and why a 100% bounce rate would be considered good or bad? I'm particularly interested in how it relates to user engagement and the overall success of a website. Thank you in advance for your help.