Try to post content based on users ideas. Make the content simple and understandable by the users and also presentable. Surely the bounce rate...
First important factor is to not do over on page or off page optimization. You can do forum participation, blog comments, articles in top...
You need to put valid and keyword targeted contents on the site. Optimize the site to search engine friendly. Make the site user friendly, so that...
I think you can check Google Analytics for the absolute information. There are many other paid services available online.
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