The document discusses Polleverywhere, a service that allows users to conduct polls and capture audience participation. It can be used to conduct surveys, provide instruction, and for training. Users can create multiple choice or open response polls that participants can answer via text, Twitter, or a web form. Poll results are displayed in real-time and can be embedded in presentations. The service has advantages like being easy to use, providing anonymity, and allowing for faster responses. However, it also has disadvantages like reliance on technology and the need for a creative approach with large groups.