Relying too much on one source of traffic is a risky strategy. A particular channel or strategy can be fantastic for generating traffic today, but it doesn’t mean it will stay the same tomorrow. Some sites lost out when Penguin started penalizing on certain SEO linking practices. Others lost out when Facebook decided to massively restrict organic reach. If your site relies exclusively on only one source of traffic, then algorithm changes can create some serious trouble for you. So be aware of the importance of diversifying and know the options available from different traffic sources.
The Featured Snippet section appearing inside the first page of Google is an incredibly important section to have your content placed within. I did a study of over 5,000 keywords where ranked on page 1 and there was a Featured Snippet being displayed. What I found was that when was ranking in the Featured Snippet, the average click-through rate to the website increased by over 114%.
Traffic data is a great way to take the temperature of your website and marketing initiatives. When you are writing and promoting blog content on a regular basis, you can use traffic data to track results and correlate these efforts to actual ROI. Be sure to look at traffic numbers over long-term intervals to see trends and report on improvement over time.  
RankBrain can have an impact on your keywords campaigns. When you are defining your keywords, you are looking for relevant terms that respond to customers queries. This is how a successful SEO strategy works. And logically, if you are picking keywords your audience is not searching for, you campaign will have no chance to succeed. This is where RankBrain can play a role.
Mobile traffic: In the Groupon experiment mentioned above, Groupon found that both browser and device matter in web analytics’ ability to track organic traffic. Although desktops using common browsers saw a smaller impact from the test (10-20 percent), mobile devices saw a 50 percent drop in direct traffic when the site was de-indexed. In short, as mobile users grow, we are likely to see direct traffic rise even more from organic search traffic.