Keeping in mind the last point, SEO agencies are fluent in navigating through a wide range of online marketing tools that helps increase the value of your marketing strategy. Whether it's using web analytics for carrying out research or conversion tools that monitor and report the usage of important keywords, SEO agencies know how and where to get the information they need to save time and reduce your in-house cost.

As mentioned earlier, SEO agencies are usually the most qualified in dealing with various verticals of online marketing, mainly due to the nature of their work. Therefore, an SEO agency is able to solve a multitude of problems which a business simply cannot handle by itself. An SEO agency can work together with a business to provide an added perspective, when it comes to understanding and developing marketing strategies for different sectors and various types of business websites.

Lastly, search engines like Google realize all too well that websites that don't add value to a searcher's experience on the internet are not worth a mention in their index. Furthermore, in some cases Google might also decide to drop your website from the SERPs altogether if you've used spam to get a higher page ranking.