You’ve been cranking out articles for your website. You’re answering questions, explaining complicated issues and addressing the emotional needs of prospective clients. Of course, your traffic is increasing and you’re watching the growth with Google Analytics.

Now it’s time to figure out if your audience is really engaging with your content. PostRank to the rescue. PostRank is a scoring system for any kind of online content. It measures the engagement with your content by tracking user behaviors like bookmarking, commenting or clicking on links. It’s an easy way to figure out if users find your content worth sharing with others.

Measuring this type of reaction to your content is difficult because many prospective clients may become aware of you without directly visiting your site. It’s useful to know if you’re reaching people who aren’t directly discoverable using a tool like Google Analytics. If your content isn’t engaging and, therefore, isn’t spreading across the web, it’s valuable for you to know so you can make changes.

PostRank pays attention to services like FriendFeed, Digg, Tumblr, Twitter, del.icio.us and others to calculate a score for each of your articles. The score is constantly updated as the content spreads. PostRank is free, but offers paid services as well. Use PostRank to compare engagement scores for various articles on your site and see what’s working. Use the service to measure the engagement of users with your competitor’s sites and learn from their successes and failures. PostRank is a tool worthy of adding to your toolkit.