There are no traffic requirements, your site just needs to be presentable and have a good amount of quality content. If you rely on user-generated content, traffic may be relevant, because a forum without much traffic probably won't have much content either.

User generated content is important since it would add to a forum's overall content. But generally needs to keep to the guidelines of the adsense requirements.

In clips via youtube, there is talk of over ten pages on a site or blog with many thousands of words. It would appear, for some approvals it could be a few years until that sort of number is reached.

There's a lot of crappy information floating around on YouTube and elsewhere. A one-page website could also be approved. The requirement is that a website is reasonably "complete". For some sites, that may be a thousand pages, for others only a few.

I am only going from what I've read on these forums via past topics. Subjects, like health or tech, IT, entertainment and politics don't tend to be approved.

One page? A few like five or six. And then thousands, well yes, that would work. But that isn't realistic. Then again, perhaps years down the road and or a forum it could work out.

I saw last year one channel suggests good approval happens with seventeen pages or something, after about half a year, less not likely to happen. Thousands of words, blah blah. Reminds me of a long book with chapters, and pages and pages.

Website domains can be changed months or a year down the road, with success or no success of having been approved?