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:
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 
While it’s best to create a custom dimension for filtering out bots, applying the generic bot filter is a good place to start. It’s important to note that filters cannot be applied retroactively, so if you’ve recently turned on this feature, you should be receiving less traffic. Additionally, double-check that you are filtering out your own traffic and IP address.
AllRecipes: This site is one of the larger recipe-focused sites on the web, and it also has a reputation amongst foodies for having a ton of comments about “this recipe was terrible, also I made X, Y, and Z substitutions.” You, too, can take advantage of these recipe comments to promote your own changed version of the recipe, if you have a cooking blog.
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.
Do you have a content strategy in place, or are your efforts more “off the cuff?” Not having a clearly defined keyword map can spell trouble — especially if two or more pages are optimized for the same keyword. In practice, this will cause pages to compete against each other in the SERPs, potentially reducing the rankings of these pages. Here is an example of what this might look like:
Visual assets aren’t regular images you might pull from a Google Image search. Instead, these are unique diagrams or infographics you’ve created specifically for your epic content. These kinds of diagrams or infographics explain a theory, communicate a point, or showcase data in exciting and interesting ways—and gain attention (and links) because of it.
Organic traffic is the primary channel that inbound marketing strives to increase. This traffic is defined as visitors coming from a search engine, such as Google or Bing. This does not include paid search ads, but that doesn’t mean that organic traffic isn’t impacted by paid search or display advertising, either positively or negatively. In general, people trust search engines, and sayings such as “just Google it” reinforce that humans are tied to the search engine. Thus, paid search, display, or even offline campaigns can drive searches, which may increase organic traffic while those campaigns are running.