What's the meaning of "affairs"?

What’s the meaning of “affairs”?

‘Affair(s)’ has a lot of meanings: matter, concern, business, incident, case.
Here we speak about a TV News program with ‘current affairs’ - it means: a sequence of events of the day.
I hope it helps you to understand the phrase.

The other really common uses would be extramarital affairs (cheating on your spouse), and personal affairs (routine personal business–in particular, the expression “putting your affairs in order” describes what you might do if you’re terminally ill).