also: ほれ
interjection
Used to draw attention to something, often while pointing or presenting something. Can also express mild surprise or urge someone to notice.
ほら、あそこに虹が出ているよ。
Look, there's a rainbow over there.
ほら、言った通りでしょ。
See, I told you so.
The origin is uncertain; it is a native Japanese interjection with no clear kanji or historical derivation.