Luggage regulations refer to the rules set by airlines regarding the size, weight, and number of bags passengers can bring on board. Each airline has specific limits, often allowing one carry-on bag and one personal item, such as a backpack or purse. Checked luggage typically has weight restrictions, usually around 50 pounds, and may incur additional fees if exceeded. Security regulations also play a role in luggage rules, prohibiting certain items like liquids over 3.4 ounces and sharp objects. Passengers should check the airline website for detailed guidelines and prepare their bags accordingly to ensure a smooth travel experience.