Beispielsweise:
I am not familiar with "...". Could you provide a brief explanation, please?
Could you explain the meaning of "...", please.
What does "..." stand for?
What is the meaning of "...".
I am a bit confused by "...". What does it mean?

If I understand the question, you are asking about the significance of the three dots in a sentence, as in "Bob and Ann went to school, then to town . . ., then home."

The dots show that words were omitted from the quote.

Vielen Dank!
Das hilft mir sehr weiter!!!

@HappyWarrior:

No I'm not asking about the significance of the three dots.

Oxymorphon understood me.

What does the abbreviation "..." mean / stand for?

that's how I would put it.

what does the acronym AKSLKE stand for?

maybe.