Difference between wait and sync in QTP

Wait:-Wait statements instruct QuickTest to wait a specified amount of time before proceeding to the next step.

syntax: Wait(10)
Here the QTP will wait for 10 sec and after that it will proceed for the execution of the next step

Sync:
This method is only available for Web.
This method can be used to synchronize the test execution with a new web page that has to appear in the browser.
This method is used when QTP is not sure how long it is going to take to load page