In other words, actively developing your own media allows you to be in much better control of what results come up in the search results pages and for which keywords. When flawlessly implemented, this concept allows you to dominate entire search results pages, thus harvesting most of the search traffic for the chosen search terms, leaving nothing to your competition.
Not all web traffic is welcomed. Some companies offer advertising schemes that, in return for increased web traffic (visitors), pay for screen space on the site. There is also "fake traffic", which is bot traffic generated by a third party. This type of traffic can damage a website's reputation, its visibility on Google, and overall domain authority.