It's frustrating that I have a thriving online community with tens of thousands of posts. Sadly, Google hardly indexes any of it.
It's hard to know all of Google's reasons for why it does not index pages. But there is one huge, glaring mistake that I know Google sees as an issue: duplicate canonical URL tags.
You see above the meta tags from one post on my community. Each post possesses two distinct canonical URL meta tags. The first one is at the top of head that contains the homepage URL for the community. Each post includes this metatag. Further down in the head you will see the proper tags for the post page that I am on. When we are on a post page, the canonical for the main URL must be removed. This is confusing Google, as it does not know the true URL to the page.
This has been a problem for almost 3 years. I would really love for it to be fixed.