This forum has a feature where users can turn on sound notifications on new chat messages, replies, etc. You can set it up at the bottom of the User Settings page.

When creating a new post, you have the option to add up to 5 tags. At the bottom of the post editor, begin typing a word and select the most appropriate tag that fits your post’s content. If needed, you can also create new tags in the same way: simply type the word and press Enter.