Tasks or goals that are easily achievable with minimal effort.
The easy stuff that should have been done already but wasn't.
"Let's focus on the low-hanging fruit first." (Translation: We have no strategy, so let's do the obvious things and call it progress.)
From agriculture, where it literally meant fruit that was easy to pick. In business, it means "the things we've been ignoring because we were too busy pursuing our 'big vision.'"