Adobe Premiere Ripple Edit
A ripple edit means moving an edit point and causing the rest of the timeline to move the same amount to compensate.
To perform a ripple edit, select the ripple edit tool (pictured right) from the tool panel. Position the mouse at the edit point in the timeline and drag left or right.
In the following example, the first timeline shows the original edit. In the second timeline, the edit point between clips 2 and 3 has been advanced with a ripple edit. The remaining clips are advanced the same amount, increasing the length of the timeline.
See also: Rolling Edit