Analyzing the Web site referrers in the traffic-tracking software shows where the visitor was REFERRED
Following those visitors' PATH
(another option available with sophisticated tracking software
) diplayed a number of sales resulting from the initial
entries into the site.
Not as much as the regular SERPs - but every sale helps
Google and Yahoo uses somewhat similar ALGOs when in image relevancy - so aceing both of them really can add enourmous traffic
In cases of FAN sites (eg The Beatles) if you have affilliate links with enticing products or collectbles (eg Beatles Posters) - traffic coming directly
to that page can add additional sales potential.
Ironically, even audio and video searches can have impact if you have a RELATED
product or service being pushed.