If we need to wait for all the objects in the page to be displayed then we can use the sync.
Browse().Page().sync
If we dont need to wait for all objects to display than we can use synchronization point which will wait untill that perticular object appears.
say if u need perform an operation on Add button and we should wait for 'Add' button in a page to be activated than we can go for Synchronization point. So it waits till that button appears. and move to next step in script.