Talk pages (also known as discussion pages) are administration pages where editors can discuss improvements to articles or other Wikipedia pages. The talk page associated with an article is named "Talk:Example", where "Example" is the name of the article. For example, the talk page for discussion of improvements to the article Australia is named Talk:Australia. The talk page associated with a page in another namespace is named by adding "talk" after the namespace label; for example, the talk page for Wikipedia:About is called Wikipedia talk:About.
When viewing an article (or any other non-talk page) on the desktop Wikipedia, a link to the corresponding talk page appears on the "Talk" tab at the top of the page. Click this tab to switch to the talk page. On the mobile Wikipedia, type "Talk:" and the article's name in the search bar. (There are plans to provide easier talk access on mobile.)
User pages also have associated talk pages (for example, User talk:Jimbo Wales for Jimbo Wales' userpage.). When other editors need to contact you, they will usually do this by leaving a message on your talk page. When someone has left you a message that way, you will either see an orange information notice the next time you log in or view a page on Wikipedia if you are editing as an IP address, or a red badge next to your username if you are logged in.