But optimizing keywords isn't something you do ONLY at the outset of a search marketing campaign. Ongoing keyword optimization is necessary to keep uncovering new keyword opportunities and to expand your reach into various keyword verticals. So keyword optimization isn't a set it and forget it process. By continuously performing keyword analysis and expanding your database of keywords, your site traffic, leads and sales will continue to grow.

An ideal keyword has high monthly searches and a relatively low keyword difficulty. Once you find some keywords that make sense for your business, have a relatively high search volume and a relatively low keyword difficulty, it’s time to research the competition. However, you’ll first want to understand how local searches affect organic search engine optimization.
The response rate here was huge because this is a mutually beneficial relationship. The bloggers get free products to use within their outfits (as well as more clothes for their wardrobe!) and I was able to drive traffic through to my site, get high-quality backlinks, a load of social media engagement and some high-end photography to use within my own content and on product pages.
Internet marketing professionals refer to search that isn’t organic as paid search. Instead of organically, or naturally, reaching the top of the search results for a particular keyword, businesses can pay to get noticed. So, paid search is a bit like doing a local endorsement, TV ad or radio spot—but for the internet. When a consumer types in a search term that you’ve incorporated into your campaign, your ad will show up at the top of search page results, above the organic results. Sometimes, your ad may appear in the sidebar. Only if the consumer clicks on your ad do you pay anything.
Regarding Link Detox, links it diagnoses as Toxic are generally fine as they're either not indexed by Google or have malware/viruses/etc., but I recommend a manual review of any diagnosed as Suspicious. I used it recently to get started cleaning up our backlinks and some legit sites and blogs were under Suspicious simply because they didn't have many links pointing to them.
Paid social can help amplify organic content, using social network advertising tools to target the audience. Using the rugby example, on Facebook you could target people who like other leading rugby fan pages. I recommend testing paid social campaigns to promote key content assets like reports and highlight important news/announcements. With a small budget you can quickly measure amplification impact.
Create a spreadsheet to monitor your results. It’s a good idea to make a note of the post’s original post date, original word count, the date updates were made, and the new word count. Also note the number of post views during the 30 days prior to your changes, along with a summary of changes made and any other important metrics you want to track. Check your traffic after 60 days to see if traffic has increased.
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.
Knowing which pages visitors go to directly gives you an opportunity to design those pages so they accurately and quickly address visitors' needs. For example, if you sell clothing and your new-arrivals page is a popular destination, you want to be sure the content is always fresh, and you want to provide easy access to the full department represented by each new item. Who wants to see the same items week after week on a page that is supposed to represent the cutting edge of your inventory? And if you're featuring a new raincoat or bathing suit, you want to let visitors also easily see your whole line of raincoats or bathing suits."
Organic Traffic is possible only with SEO. In Search Engine Optimization, you will customize your website to boost its ranking on the search engine result page. There are many search engines like Google, Bing, Yahoo and many as 70% of people around the world uses Google as the primary gateway to connect to the internet we also consider working on it, in this article. Concepts discussed here is more or less applicable in other search engines too. SEO is all about experimenting, as there are more than 200+ ranking factor to rank the page in Google like link building, optimize content for a keyword, image optimization etc., 
For our client: We were lucky enough to remove most from the prior agency outreach, we also went directly to many webmasters in which we wanted to remove links. We did not use the Disavow tool as it was not around when we completed this link cleanup, but we all know it has been said that if you are going to use the Disavow Tool to use it with caution.
Good question, for most directories I use they ask for mobile number to send a message of verification, for the ones which phone you for verification inform the company before hand to tell their customer service people to be ready. I know the bigger the company the more tricky these things get you just have to find out what works best to answer the calls even if they give you a direct number to use. 
Love the five different area of investigation that you went over, great way to analyze and diagnosis the issue. I would also definitely agree doing a rankings comparison between the two time frames, and not only check what your Google ranking is, but also track the search volume for your keywords to see if it has fluctuated or gone down. Google Trends is a great tool for this as well, as one of your keywords that your ranking for may have just lost popularity online.

Google has made it clear that their primary objective is to present the best possible experience to its users. For websites looking to rank on top of Google SERPs, a quality user experience is imperative. Fifteen years ago, websites could rank high based on manipulative tactics like keyword stuffing, link scheming, and hidden text. Since these actions negatively affected user experience, Google began to crack down on them with each algorithm update, and those techniques eventually became counter-productive for ranking position. In 2018, to rank well on Google, a website must focus on:
Google has made it clear that their primary objective is to present the best possible experience to its users. For websites looking to rank on top of Google SERPs, a quality user experience is imperative. Fifteen years ago, websites could rank high based on manipulative tactics like keyword stuffing, link scheming, and hidden text. Since these actions negatively affected user experience, Google began to crack down on them with each algorithm update, and those techniques eventually became counter-productive for ranking position. In 2018, to rank well on Google, a website must focus on:
Beyond organic and direct traffic, you must understand the difference between all of your traffic sources and how traffic is classified. Most web analytics platforms, like Google Analytics, utilize an algorithm and flow chart based on the referring website or parameters set within the URL that determine the source of traffic. Here is a breakdown of all sources:
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