KeywordRanking.com reports that about three quarters of businesses polled are not working with a firm to help them with search engine rankings. Half handle the chores in-house. One out of five haven't even started to implement either paid search or search optimization strategies. Of those brands running campaigns, 55 percent count sales generated as the chief factor in measuring performance. 28 percent consider site visitors to be the main metric. A much smaller, odd assortment of companies spend more attention on the number of pages indexed by search engines, the number of keywords ranked, brand lift and the number of in-bound links produced.