Flag icon?

Not sure where to ask this but after the subject line on one of my posts, it has a small flag icon after it and just wondering what that means. Thanks.

The flag icon means you're subscribed to the topic. When you post something this goes automatically. But you can also hit the subscribe button, right next to 'reply topic'...if you want to follow a certain topic. This way you get an email alert when there's a new post.
You can always 'unsubscribe' as well.

Ok thanks. That makes sense and is a good idea.