Hosts provide a visible and active presence on BBC Internet sites on which the public places user-generated content. All such sites should have a host. A good host will meet and greet, stimulate discussion, monitor the overall tone of conversations, defuse rows and take pride in their space. The host's presence should help create a distinctive experience for the visitor, whether the space is premoderated, postmoderated or reactively moderated. They may also be able to offer, or point to, some expert knowledge on the subject in question. The person who is editorially responsible for the content should ensure that all hosts are properly trained, adequately funded and able to respond to changes in circumstances and context, which may affect the level of hosting required.