Tor provides anonymity by building circuits with threerelays. So instead of connecting directly to the destination server, a connection is made between each relay of the circuit and this takes more time.
Some people misuse the Tor network, sometimes on purpose or sometimes by lack of knowledge. For instance, Tor is sometimes used to conduct [[!wikipedia Ddos#Distributed_attack desc="DDoS attacks"]]. By doing this, the Tor relays are the ones who actually suffer from the attack, instead of the intended target.Some people use [[!wikipedia Peer_to_peer desc="peer-to-peer software"]] through Tor which is bad for the network.