Three dots. Dot, dot, dot. What could be simpler? Then why do those dots make so many writers dotty? The rules for use of ellipses are not as simple as they seem. But they are manageable.
Ellipses signal, in addition to elision, a faltering or trailing off (in which case they are sometimes called suspension points), but to prepare the reader for an abrupt break or interruption in thought, use an em dash.
The primary function of an ellipsis is to omit one or more inconsequential words from a quotation, as in this version of a sentence...
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