Google has been very clear about its intentions to quote:

“Our goal is simple: to give people the most relevant answers to their queries as quickly as possible. This requires constant tuning of our algorithms, as new content—both good and bad—comes online all the time.”

Obviously they are trying to find “good content” and based on my research that means, in part, more content. Start thinking in terms on 800 words and up, 1,300 to 1,500 words may well, when well written, be better yet.