There are some questions from this websites as follow.
- What are the differences between title and tags?
- For submit new thread, what are the differences between thread and message. Are they interchangeable?
1 The title is what appears in the index when you open a section of the forum. Tags are keywrods that are associated with a topic, so you can look for similar subjects: http://www.usingenglish.com/forum/tags/
2 A thread is all the messages together- the question and all the replies. There are now two posts in the thread- your question and my answer, so they aren't intercvhangeable.