You control the cost of search engine marketing and pay nothing for your ad to simply appear on the search engine. You are charged only if someone clicks on your ad, and only up to the amount that you agreed to for that click. That’s why SEM is also known as pay per click (PPC), because you only get charged for each click that your ad generates. No click? No charge.
Now, it is not that these sites are not interested in Google users. In fact, they have hired us to help them increase their share. However, they are getting so much traffic from sites like Facebook that it seems there is less urgency about attracting this traffic and less willingness to change the site to meet organic standards. Not long ago, sites would urgently and unquestioningly abide by Google’s standards to court that traffic.