For our client: We rolled out a successful implementation of rel="author" for the three in-house content writers the company had. The client had over 300+ articles made by these content writers over the years and it was possible to implement rel="author" for all the aged articles. I advise anyone who has a large section of content to do so as it will only benefit the website. We were also in the process of rolling out further schema markup to the site's course content as it only has a benefit for CTR.
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 
In addition to giving you insight into the search volume and competition level of keywords, most keyword research tools will also give you detailed information about the average or current estimated CPC for particular keywords are. This is particularly important for businesses with smaller ad budgets and this feature allows you to predict whether certain keywords will be truly beneficial to your ad campaigns or if they’ll cost too much.
The ad auction process takes place every single time someone enters a search query into Google. To be entered into the ad auction, advertisers identify keywords they want to bid on, and state how much they are willing to spend (per click) to have their ads appear alongside results relating to those keywords. If Google determines that the keywords you have bid on are contained within a user’s search query, your ads are entered into the ad auction.
Whether it may be on social media or your blog, it’s important to publish evergreen posts that do not contain an expiration date. These posts should be engaging and stand out for your readers to stay intrigued. If you’re having trouble of thinking about what to post, consider content that is educational and fun. Statistics show that users tend to share more positive posts than negative ones.
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 HubSpot.com ranked on page 1 and there was a Featured Snippet being displayed. What I found was that when HubSpot.com was ranking in the Featured Snippet, the average click-through rate to the website increased by over 114%.
With more and more content being created on Facebook every day, organic reach is steadily declining. That’s why you might want to consider using Facebook’s paid advertising options to promote and increase the reach of your posts. While organic posts only get shown to your own Facebook fans, paid ads allow you to target people who have not liked your page but have similar interests and/or demographics.
Black hat SEO refers to the practice of trying to trick the search engines into giving you higher rankings by using unethical tactics, such as buying links. The risk is just too great. Even if you enjoy a temporary boost in rankings due to black hat tactics, it’s likely to be short lived. Google is getting better and better at spotting dirty tricks and sooner or later the progress you made will be wiped out by an algorithm update, or worse, your site will get removed from the index altogether.
Well, yes and no. Sure, you can get hit with an algorithm change or penalty that destroys all your traffic. However, if you have good people who know what they are doing, this is not likely to happen, and if it does, it is easy (in most cases) to get your visits back. Panda and Penguin are another story, but if you get hit by those it is typically not accidental.