To get across is to make an idea understood by others. Get across the main point.
It is about the listener rather than the speaker, which is what makes it a test of communication. A point that fails to get across was not made, whatever was said.
1phraseget acrossTo make an idea understood by others.
“He could never quite get across why the change mattered.”
get across is a phrase.
Practised in Phrasal Verbs