SEO is supposed to be StackOverflow's core competency. They are completely aware most people end up on their site via Google. The search on their own site sucks.
The reason Q&A sites are so visible is that people tend to type questions in their search engines, so Q&A sites are a good match to those.
The reason Q&A sites are so visible is that people tend to type questions in their search engines, so Q&A sites are a good match to those.