The more complex your information system is, the more you will have bugs, and the more you will have symbol files to manage. The cool thing is that second ones can help you resolve the first ones, read my first post if you are not sure about that. The sad thing is that you could end up with tons of symbol files, and finding the right one for every version of you binaries is just too complicated.
I have long pondered about the subject of my first post. Debugging subtle bugs on Windows can be easy or not, but one thing is sure: it is really a pain to understand what happen in a software (at least a native one) without the Symbols. There is lot to say about it, and you can find lots of article on the internet describing the contents and the benefits. My approach will be much more practical: a short description, and why you definitely have to create and use them.