This is the 260th most frequent Hungarian word.
erről
"Erről" means "about this" or "from this" in English, depending on context.
Here 'erről' refers to a topic or subject of the discussion, meaning 'about this' or 'about it'.
Erről beszéltünk tegnap.
We discussed this yesterday.
In this sentence, 'erről' indicates the topic of the question, translated as 'about this' or 'concerning this'.
Kérdeztél valamit erről?
Did you ask something about this?
'Erről' in this context refers to the subject based on which the conclusion was made, meaning 'about this' or 'concerning this'.