While working on SEO standards for a new CMS project I came across a dilemma which required an answer. The CMS was generating multiple Meta Description tags for some content and the only piece I was able to control was in which order they would appear. That said, I setup a test web page with multiple meta description tags and waited for Google to crawl it. The results confirmed what I suspected – Google defaults to the first Meta Description tag it finds and uses that when creating the SERP entry.