A telethon is a special television event where people watch TV shows and are asked to donate money to help a cause. All the money collected during the telethon goes towards helping the cause. During a telethon, celebrities and other people who support the cause will be on the show to talk about it and give people a chance to donate. People who watch the show can donate by calling in, sending money online, or sending a check in the mail. The money collected is used to help important causes like fighting disease, providing relief to people in need, and helping to protect the environment.