The 3 dots constitute a common punctuation device that most people don't understand. They're called an "ellipsis".
According to Wikipedia: Ellipsis (plural ellipses; from the Ancient Greek: ἔλλειψις, élleipsis, "omission" or "falling short") is a series of marks that usually indicate an intentional omission of a word in the original text. An ellipsis can also be used to indicate a pause in speech, an unfinished thought, or, at the end of a sentence, a trailing off into silence (aposiopesis). When placed at the end of a sentence, the ellipsis can also inspire a feeling of melancholy longing. The ellipsis calls for a slight pause in speech.
The most common form of an ellipsis is a row of three periods or full stops (…) or a pre-composed triple-dot glyph (…).
When an ellipsis comes at the end of a sentence — rather than in the middle of a thought — a fourth dot is added to indicate "stop".
Nobody should string together anymore than four dots; not five, six, seven, or more. It just shows that the writer doesn't know anything about proper punctuation or the meaning of the dots.