Organic is what people are looking for; the rest of these simply put things in front of people who may or may not be seeking what you offer. We know that approximately X number of people are looking for Y every day. So if we can get on front of those people, we have a much greater opportunity to create long-term relationships and increase our overall ROI.
In most cases, the largest amount of traffic to your site will be comprised of direct and organic traffic. If you have a partnership with an industry association or manufacturer, you may see referral traffic from their website. If you decide to do paid advertising such as pay-per-click marketing, you might see traffic coming in from ad campaigns as well.
Google claims their users click (organic) search results more often than ads, essentially rebutting the research cited above. A 2012 Google study found that 81% of ad impressions and 66% of ad clicks happen when there is no associated organic search result on the first page. Research has shown that searchers may have a bias against ads, unless the ads are relevant to the searcher's need or intent 
I’ve always been a believer that hard work gets the best results, and in practice it always ends up being true. On the web it’s no different. If you want more organic traffic, you have to work for it. That means giving your best effort every time, going after opportunities your competitors have missed, being consistent, guest blogging strategically, and staying on Google’s good side.
Referral traffic in Google Analytics can also include your social traffic or even your email visits. This is largely because there are different ways to track data and there are imperfections in the system, but it also depends on which reports you look at. For example, Acquisition> All channels> Referrals will include much of your social traffic, but the default All channels report does not include Social in your Referrals. The best solutions:
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.
After adjusting that, the table refreshes again and I’m looking at a month-by-month summary of my Organic Traffic. Hover your mouse over any single month dot to view a summary of that month’s numbers. In this particular example, we can see that recently there’s been an increase in Organic Traffic. January had 6,630 organic sessions, February (short month) had 5,982 and then March came in strong with 7,486 organic sessions. This information lets us know that something on the site is performing better than usual in March. In most cases, this means that either interest in a topic has increased or the website has begun to rank better in the search engines for specific keywords. In the next section we’ll begin to break this down further.
So, how can we minimize the amount of dark social traffic which is bucketed under direct? The unfortunate truth is that there is no magic bullet: proper attribution of dark social requires rigorous campaign tracking. The optimal approach will vary greatly based on your industry, audience, proposition, and so on. For many websites, however, a good first step is to provide convenient and properly configured sharing buttons for private platforms like email, WhatsApp, and Slack, thereby ensuring that users share URLs appended with UTM parameters (or vanity/shortened URLs which redirect to the same). This will go some way towards shining a light on part of your dark social traffic.
Amy Gesenhues is Third Door Media's General Assignment Reporter, covering the latest news and updates for Search Engine Land and Marketing Land. From 2009 to 2012, she was an award-winning syndicated columnist for a number of daily newspapers from New York to Texas. With more than ten years of marketing management experience, she has contributed to a variety of traditional and online publications, including MarketingProfs.com, SoftwareCEO.com, and Sales and Marketing Management Magazine. Read more of Amy's articles.
Unfortunately, this particular client was fairly new, so as a result, their Moz campaign data wasn’t around during the high organic traffic times in 2015. However, if it was, a good place to start would be looking at the search visibility metric (as long as the primary keywords have stayed the same). If this metric has changed drastically over the years, it’s a good indicator that your organic rankings have slipped quite a bit.
Forums are probably one of the least effective forms of free traffic, but it all depends on the forum. You’re looking for large, active communities where you can carve out a bit of a reputation for yourself. Sure, you can dominate a small forum, but the returns won’t be worth it. Conversely, too large a site and you may have trouble attracting attention at all. It’s a hard balance to strike.
This is the number of views that you can test each month on your website.It's up to you how you choose to use them, either by allocating all the views to one test or to multiple test, either on one page or on multiple pages. If you have selected the 10.000 tested views plan and you run an experiment on your category page which is viewed 7000 times per month, then at the end of the month 7000 is what you'll be counted as tested views quota.