Seeders are individuals or systems that share files over a network, particularly in peer-to-peer (P2P) file-sharing environments. They upload and distribute pieces of a file, allowing others to download it. The more seeders there are for a file, the faster and more reliable the download process becomes. In the context of BitTorrent, seeders play a crucial role in maintaining the availability of files. When a user finishes downloading a file, they can choose to continue sharing it as a seeder, contributing to the overall health of the network and ensuring that others can access the content easily.