Despite innovations that make it possible for retailers to reach prospects with ads the moment they enter a search term, managing the campaigns directed at the buyers has remained a gargantuan task without a magic bullet to help them yield the best results.

FORBES: Improved Paid Search Ads Spurring Growth In E-Commerce

Just as fever (which is also controlled by cytokines) creates an environment hostile to the reproduction of bacteria and viruses, so lethargy conserves energy that can be directed to building up the immune system an extremely demanding task.

ECONOMIST: Fatigue: Killing time | The