on Writing Forward site:
You see it everywhere, but most people don’t know what it’s called or how to use it properly.
In fact, it’s often referred to as “dot, dot, dot” even though it does have a name. This punctuation mark is the ellipsis.
It is a series or row of three periods, which is usually used to indicate an omission. It may also be used to indicate faltering or interrupted speech or a pause.