First, I will show you a quick snapshot of the traffic uplift, which yielded an additional 400,000 unique visitors from organic search traffic on a monthly basis. Then I will explain to you the steps in which we took to get the client to this level. I have also tried to keep this quite general so everyone can adapt their own situation to this case study.
Your strategy defines your audience, your platform, your content, and even how you measure success. For example, if you sell a product for a young demographic, you may decide that Instagram is the best place to build your brand by using a series of witty pictures with a strong call to action to make a purchase. Alternatively, you may decide to extend the reach of your brand by attempting to break into a new market, such as building a rapport with women, who comprise a large proportion of Pinterest users. Micro-blogging may be an ideal way to give busy business people the bite-sized content they need on their morning commute, while infographics provide visual punch to make a point instantly.

With organic search, you don’t have to outspend your competitors to outrank them. Your competitors can’t recreate the content experience that you use to drive organic traffic.  This one is major. PPC is easy to replicate and reverse engineer. Many spy tools allow you to dissect paid campaigns to see what’s working and what’s not. You can get insight into what ad creatives generate the most clicks.
Search engine optimization (SEO) campaigns generate organic traffic. The goal of SEO is to improve website ranking for relevant keywords. You want your website to show up on the first page of organic search results – ‘organic’ refers to the middle section of results you see in search engines – for what you’re selling, and you’d probably be considered super human if you did that without organic SEO.
As an Internet marketing strategy, SEO considers how search engines work, the computer programmed algorithms which dictate search engine behavior, what people search for, the actual search terms or keywords typed into search engines, and which search engines are preferred by their targeted audience. Optimizing a website may involve editing its content, adding content, doing HTML, and associated coding to both increase its relevance to specific keywords and to remove barriers to the indexing activities of search engines. Promoting a site to increase the number of backlinks, or inbound links, is another SEO tactic. By May 2015, mobile search had surpassed desktop search.[3] In 2015, it was reported that Google is developing and promoting mobile search as a key feature within future products. In response, many brands are beginning to take a different approach to their Internet marketing strategies.[4]

With the development of this system, the price is growing under the high level of competition. Many advertisers prefer to expand their activities, including increasing search engines and adding more keywords. The more advertisers are willing to pay for clicks, the higher the ranking for advertising, which leads to higher traffic.[15] PPC comes at a cost. The higher position is likely to cost $5 for a given keyword, and $4.50 for a third location. A third advertiser earns 10% less than the top advertiser, while reducing traffic by 50%.[15] The investors must consider their return on investment and then determine whether the increase in traffic is worth the increase.
Organic search is extremely important for online retailers, as many studies suggest it drives around 50% of website traffic. When it comes to search engine optimization for eCommerce, marketers get obsessive about testing all methods available to them to try and achieve higher rankings. The logic is very simple: higher positions on SERPs automatically result in higher impressions and a significantly better click-through rate. More people visiting your store should ultimately translate into better conversions and higher revenues.  
I am too much late to commenting on this article. I want to read "How much get Organic traffic by SEO", found your your article on top & really very interesting. James Norquay, you did good research.I think Now days google block mostly SEO activities. Is this worthy for current marketing scnerio?If any other post to related strategy for increasing Organic traffic, you can reffer me.
Organic is different. Matching keywords to user intent means you may be present in many searches. The user may find you consistently, and once they get to your site, they are more likely to stay. Organic users are still your best long-term customers. In my experience, they have lower bounce rates and more pages visited, and they are more likely to return.