A petrol station price board is a sign displaying fuel costs, ranging from traditional flip signs with physical numbers (using durable acrylic/metal) to modern LED/digital displays, offering features like remote updates, promotions, and excellent nighttime visibility, crucial for advertising and communicating real-time prices to customers. They vary in technology, materials (aluminum, stainless steel), and functionality, from static displays to dynamic scrolling or full-color screens, using materials like UV-resistant acrylic or weather-proof metal.