Why is "Samsung Push Service" using so much of my battery?

Looking at the battery usage summary on my Galaxy Ace Plus (GT-S7500), I found that "Samsung Push Service" (v1.0.4) has used 29% of my battery. I'm having problems with the battery not lasting very long (about 1 day mostly on standby), so anything that extends the time a charge lasts will be valuable. What does the "Samsung Push Service" do? Should I uninstall it (I never chose to install it, so it must have been on the phone to start with), or is there another way to reduce it's battery usage? Edit: When drilling down into the Samsung Push Service from battery usage, I see that is keeping my phone permanently awake. This doesn't seem sensible!