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.
While there are several HTML tagging techniques that improve a page’s Google SEO results, creating relevant page content is still the best way to rank high. A big part of content creation is your use of targeted keywords. You should include important keywords in your first 50 words, since early placement can be a signal of relevance. And while you should never repeat keywords too often at the expense of good writing, you should repeat keywords in your content two or three times for short pages and four to six times for longer pages. Also, you may wish to use some keyword variation in your content such as splitting keywords up as this could potentially improve your ranking.
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.
While SEO doesn’t guarantee that you will keep receiving traffic on autopilot for a long time, it does give you the peace of mind that doesn’t come with PPC marketing. Once you rank for a particular keyword, you can keep doing the needed on-page SEO to maintain your rank. By being more sustainable, SEO can help you dominate a market segment without burning a hole in the wallet.
Optimization techniques are highly tuned to the dominant search engines in the target market. The search engines' market shares vary from market to market, as does competition. In 2003, Danny Sullivan stated that Google represented about 75% of all searches. In markets outside the United States, Google's share is often larger, and Google remains the dominant search engine worldwide as of 2007. As of 2006, Google had an 85–90% market share in Germany. While there were hundreds of SEO firms in the US at that time, there were only about five in Germany. As of June 2008, the marketshare of Google in the UK was close to 90% according to Hitwise. That market share is achieved in a number of countries.