You ordered a item online through USPS using priority mail i got an email on May 13 saying electronic shipping info received does that mean i will get the item on the 15th?

No. What this message means is that the post office has been notified that the package is ready to be picked up from where you ordered it. Because USPS does not always scan their packages and update their info, it may arrive at your door before it is updated.

If you are using priority mail, assume it could take up to 5 days before you will get it.