If you’re writing content on your website, there needs to be enough of it for the page to become substantial. For those amongst you that are pondering, what if the user is searching for a quick answer? Something that doesn’t require a lot of content? Then that is where Google’s rich snippets of data come into play.
Prior to this, you may have had a case but if a user is searching for what is 2 plus 2, is it worth rendering a full website for the answer? This doesn’t mean you have to write War and Peace in order to get your point across but provide something substantial enough to readers, this can help if they have follow-up questions or perhaps need additional context to better understand your topic. This can have an impact in regards to SEO; you are being graded on answering a question or providing information in a well-rounded and informed way; if you leave some information out you may lose ground to some competitors.
Additional content also has secondary benefits, it is highly likely as you expand on a topic you will go into more detail, and this can often open up benefits around long-tail keywords. You can essentially draw in audiences searching for one topic but in multiple ways; it’s a really big advantage when you really drive content on your site in a fulfilling way to the user; perks do come when you invest time in writing well.