The VAST standard, also known as Video Ad Serving Template, is a set of guidelines and specifications developed by the Interactive Advertising Bureau (IAB) to streamline the process of delivering video ads to various digital platforms. It provides a universal framework for ad creators, publishers, and ad servers to ensure seamless integration and optimal viewing experience for online video advertisements. By adhering to the VAST standard, advertisers can reach a wider audience and publishers can easily monetize their video content, making it a crucial tool in the ever-evolving landscape of digital advertising.