In creative writing, an ellipsis can be used to show hesitation or indecision, create suspense, or indicate a change in mood. In academic writing, you use the three dots to indicate an omission.
Ah, the ellipsis… What a strange piece of punctuation… What an enigma…
The ellipsis isn't as cryptic and peculiar as it would like you to believe.
The academic technique can tighten up a quote as well as any corset, but don't lose your integrity with that last exhale. You don't want to misrepresent what someone has said. Ever been served with a lawsuit?
Good, let's keep it that way.