One of the things that can slow-bleed the traffic from your site is the quality (or lack thereof) of the content you publish on your site. Previous Google updates like Panda have already been released specifically to deal with the issue of low-quality content on websites. Long story short: Panda intended to stop sites with bad content from appearing in the search results.
You had to know social media would be on the list. I generally recommend that a site only have a presence on 2-3 social networks, at least while they’re small. It’s a lot of work to maintain, engage, and update a social network profile, and keep its messaging consistent with your branding. You can always spay someone to do it for you, but then it’s not a free traffic source, is it?
For our client: We monitored everything on a daily basis. If something came up, which needed to be fixed, we were quick to implement it with the development team at the business. We also rolled out numerous campaigns multiple times as they worked effectively the first time around in generating significant traffic so it was second nature to do the same thing twice.
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.
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.
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: