Having large groups of content that all revolve around the same topic will build more relevance around keywords that you're trying to rank for within these topics, and it makes it much easier for Google to associate your content with specific topics. Not only that, but it makes it much easier to interlink between your content, pushing more internal links through your website.
It’s not enough to produce great content and hope that people find it – you have to be proactive. One of the best ways to increase traffic to your website is to use social media channels to promote your content. Twitter is ideal for short, snappy (and tempting) links, whereas Google+ promotion can help your site show up in personalized search results and seems especially effective in B2B niches. If you’re a B2C product company, you might find great traction with image-heavy social sites like Pinterest and Instagram. Here's more advice on making the most of social media marketing.
Guest blogging is a great way of attracting new traffic, not only from the direct traffic you’ll receive via the “call to action”, but also the increase in organic traffic. Guest blogging leads to an improved backlink portfolio as you receive links from related reputable sites. Each of these backlinks count as a “vote” for your site leading to higher search engines results page (SERP’s) rankings.
To do this, I often align the launch of my content with a couple of guest posts on relevant websites to drive a load of relevant traffic to it, as well as some relevant links. This has a knock-on effect toward the organic amplification of the content and means that you at least have something to show for the content (in terms of ROI) if it doesn't do as well as you expect organically.