O que significa a expressão "for what it's worth"?

You know those expressions you come across all the time but never really get the time to understand them properly? It's like you're avoiding them with the hope they'll eventually become irrelevant, but unavoidably they show up now and then. "For what it's worth" has been one of these expressions for me. Until now. I finally got up the courage to look right into it and make sure it will grow deep roots in my brain. But if you've never heard of that expression before or, just like me, haven't given it a try to understand it, here's your chance.

If you want to understand that expression in a very simple way, just keep in mind that whenever you use it, it means you're not very secure about what you're saying. And even if you know what you're saying is right, you lack some kind of confidence. So imagine you're in the middle of a discussion with your classmates on the assignment you're supposed to hand in the next day. You have an idea about making things work smoothly but you don't know if it has any value or importance. So you say: My idea - for what it's worth - is to split the group into two so we can work better. So, in other words, what you're saying is: Even though my idea may not be important or valuable, I'm going to say it anyway. That's all for now. Take care!