SEO has undergone a vast amount of advancements since its creation during the Internet 1.0 age. The earliest stages of this process were typically a private practice amongst the top web developers at the time but this development has expanded into its own growing industry. The amount of SEO content available on the internet peaked with growing stringency of search engines who desired to show users only the best quality in results. Newer SEO programs are vastly different from their predecessors in many aspects and examples can be seen throughout the Internet.
SEO during its infancy was chaotic and eventually maliciously used by marketers for contract agreements and cyber criminals to increase their data harvesting. The use of hidden pages, link farms, pop-ups, viruses, and keyword stuffed pages made browsing search engines during the Internet 1.0 era as inefficient as it was dangerous. Search engines took it upon themselves to combat this problem by designing algorithms to detect these pages and boot them off their sites. They also penalized any company that used these methods by suspending them until they only had proper content available for users to view. The progression of these algorithms continues today, to defend searches from showing the nefarious content that had been developed.
Current SEO practices have changed with the times, and now use high quality content that is made for improving the relevance of websites. This media is written by writers or developed by experts and the rights are often given to the website owners that paid for their creation. Since SEO has evolved so much, there are even computer programs that are being designed to produce this content and retain a high level of quality and originality. These programs are still years from being legibly undetectable to the human reader, but at some point in the future, much of the content that will be produced for viewing on the Internet will have been written by a computer instead of a human.
If you are interested in viewing examples of this content, there are many new formats that have been developed. Social media networks that allow user submission of viral content can be a great example. If a product or business is subtly advertised through the viral content, it is possible that the company developed the content to entertain audiences and boost relevance at the same time. There are many other formats that are used for SEO purposes that are only limited to the ingenuity of the developers and can be found throughout the Internet.