Zulip is designed around conversations that are labeled with **topics**, to make communication organized and efficient. It’s easy to get an overview of what conversations are happening, and to read one conversation at a time. Here is what topics look like in Zulip. ![Channels and topics](/static/images/help/channels-and-topics.png) Topics are one of the most wonderful aspects of using Zulip: * Lots of conversations can happen in the same channel at the same time, each in its own topic. You never have to worry about interrupting — each conversation has its own space. * Conversations can last many hours or days, letting everyone respond in their own time. Don't worry about replying long after a message is sent — everyone will see your reply in context. Check out [Why Zulip](/why-zulip/) to learn more about how Zulip's topic model helps transform how your organization communicates.