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.
Each paid ad will likely point to a product page, a specific landing page, or something that has the potential to drive financial results. As paid marketing would suggest by its name alone, you’re spending money on ads to drive specific actions. You need to determine ROAS beyond vanity metrics alone (like engagement or total leads). Say you drove five leads but spent $5,000 on your paid campaign. Your ROAS would be $1,000 per lead, which is a bit steep (depending on your industry). In this case, you’d want to adjust your strategy to avoid wasting money.
At our agency, we work with sites of varying sizes, from very large to quite small, and recently, we have noticed a trend at the enterprise level. These sites aren’t relying as much on Google for traffic any more. Not only are they not relying on Google traffic, but also, the sites are getting less than 10 percent (or slightly more) of their organic traffic from the search giant.