ubuntu, which software I need, it is worth update?

I just had an ubuntu linux 8 display panels often have asked me to update software, but not many, I do not know what I need to update, or should be updated? Linux because I think that will not like to WIN a lot of security Update it? Thank you, pull

On the contrary, more security updates

can update the system menu that management hook Need to look at the election to update the content is not updated as long as the core, these proposals are to choose, as ubuntu is not very stable, there will always be some amendments to update the bug, so often the update is conducive to the stability of the system ~