Updating service packs in ServiceDesk Plus.

Updating service packs in ServiceDesk Plus.

I'm a new team lead of a project that has been using ServiceDesk Plus for approximately 6 years.  I'm familiar with the software from a tier one Servicedesk Technician perspective but only recently been made an admin and the previous admin was not available to coach me through some of this.  I've noticed that we are currently on Version: 8.0.0 Build 8013 and that there have been six service packs released since then.  My question is this:  How imperative is it that ServiceDesk Plus be updated?  Our current version is working fine and I don't want to start trouble where there isn't any.  Also, where can I find information about what is contained in each service pack?  Is there a information release available for each pack? 
 
 
Thanks in advance for any help or information!

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