This is a function you may require for aligning cuts of sound objects. If, for instance, the pause between two tones has become too small after cutting, you can drag the objects away from each other and increase the pause to the desired length. The created gap can be removed as follows:
Right-click the object which is to be audible in the pause and select Dock/ Extend - Extend left or Extend right. The object will exactly be extended up the next object.
Make sure you try out the magnetic Locator available in function Snap to objects. In many cases, this the easier and simpler way. See Snapping to objects.