Neon signs are bright, colorful lights made from glass tubes filled with neon gas. When electricity passes through the gas, it glows, creating vibrant colors that can be shaped into letters, symbols, or designs. These signs are often used to attract attention in places like restaurants, bars, and shops, making them popular for advertising. The unique glow of neon signs has made them iconic in urban landscapes, especially in cities like Las Vegas and New York. They not only serve a practical purpose but also add a nostalgic charm to the atmosphere, reminding many of the mid-20th century when they became widely popular.