Offline newsreading enables you to read newsgroup messages without being connected to the Internet, saving connection costs. To do this you must subscribe to the newsgroup whose messages you want to read offline, mark it to specify whether you want to see headers or whole messages, and then transfer them to your computer (synchronize). Once this is done, you can log off from the Internet and then read the messages at your leisure.
You can choose to read message headers only, which tell you the subject, author, and size of the message. Or you can select complete messages, including attached files. Synchronizing to read only the message headers in a newsgroup is much faster than synchronizing to read the messages, and it can still give you an idea of the current discussions. While you are offline, you can mark the headers that look interesting and then download only those messages when you reconnect.