Lifting long passages of text verbatim is almost certainly a copyright violation. Yes, you can republish facts, but in your own words.
As for fair use, in high level terms, that's for situations such as criticism/review, reporting, research. Like:
- a reporter reading "verbatim text" from your homepage in the context of a story about your site.
- a website publishing information about a government recall using a product picture from a manufacturer's website.
It's not fair use to just lift someone else's content for use in your main revenue driving product.
Google is free to do whatever they want with Wikipedia content, as Wikipedia's license allows anyone to do so.