Main Benefits of forum posting is to increase traffic on the site.

Forum Posting is one of the best way to generate a backlink to the website.It is the best strategy for online marketing to increase the traffic on the product or webpage.

Increase Number of Link Building and High Traffic rate . Forum also helps to improve keyword ranking in Search Engine.

I think you will getting a more traffic from from posting.

For exposure to interested users for what you are promoting

Forum links allows you to boost you’re the link popularity of your website.Hence your search engine rank will increase and brings more organic traffic.

Increase traffic and knowledge sharing.