You can receive many informations about Structured Discussions with the Notifications.
Actions with notifications
Highlight new messages
If you click on a notification for a new message, a blue highlighting will be displayed on the side of all new messages for the given Topic.
Highlight mentions or thanks
If you click on a notification for a mention or a thank on a Structured Discussions board, the message where the mention is has a green highlighting.
Actions from notifications
You can unwatch a topic from notifications. Click on the ... and then on "Stop watching activity".
You can turn off Structured Discussions notifications on your notifications preferences. Your watchlist will be still updated with a new line for every subject on a talk page you watch or a new line when someone answers a Topic you watch.
To watch a specific subject, click on the star on the top of the Topic, near of the title. It turns blue. If it is already blue, you already were watching this topic.
While watching, you will get a notification for every edit to this Topic, and a new line in your watch list.
When you create a Topic, you are auto-subscribed to this Topic.
Watch a Talk page
To watch a whole page, click on the star on the top of the page, near of the search field. It turns blue. If it is already blue, you already were watching this page.
While watching, you get a notification for every new subject posted on this talk page. You will also get a watch list entry.