A personal item normally refers to the second piece of cabin baggage that's available on most flights. Examples include a handbag, a camera bag, or a small laptop case.
Some airlines only allow a personal item for free and then charge extra for additional cabin baggage. Check your e-ticket or Manage My Booking
for details about the quantity and dimensions
of the items you’re allowed to bring.
For more info, check out the following article: Cabin baggage