This Introduction in a nutshell: Talk pages are for discussing changes. On Wikipedia, nearly everything and everybody has a talk page.
The discussion tab
If you have a question, concern or comment related to improving a Wikipedia article, put a note on that article's talk page.
You get to the talk page by clicking the "discussion" tab at the top of the article. If the tab shows up in red it just means no one has commented yet, feel free to start the dicussion.
When you start a new discussion topic, put it at the bottom of the talk page. You can do this by clicking the "new section" tab at the top of the page. This allows you to enter a new section heading and your comments.
If you are responding to someone else's remarks, put your comment below theirs. You can do this by clicking on the "edit" link to the right of that section's heading and then scrolling down.
You should sign your comments by typing ~~~~. This will automatically insert a signature along with the time you saved the page. You can choose how your signature looks if you have created a free account. If you are not logged in then a number representing your internet connection is used as your signature.