A good document organizing tool Zotero

I just started to be a graduate student who need to be ready for reading lots of and lots of article and papers online. Thus I search a tool that can help me while dealing with all these stuffs and I found that tool ZOTERO. I started to use it for taking notes about papers and keep track of the articles and sources online. It is really great tool and I thing someone like me can find it useful. You might watch that informative video.