What is the rate limit for Poloniex API?

Excuse me, I'm curious about something related to the Poloniex API. Can you please explain what the rate limit is for it? I've been doing some research on using APIs for cryptocurrency trading and I've come across the term 'rate limit' quite often. I understand it has something to do with the number of requests that can be made within a certain time frame, but I'm not entirely sure how it applies to Poloniex's API. Could you elaborate on this? I'd appreciate any insights you can provide.