I recently ran a campaign to validate an idea. Ultimately I dropped the idea, but out of 300 impressions, i got 10 clicks.. and 6 of those clicks left their email address. Not bad.
I then clicked the "optimize my campaign" button. Suddenly my clicks went up, and my impressions went up... but no one left their email. I think the trick to advertising on Google is to target niches, and scale up "manually". I also think there's something to targeting the long tail keywords rather than the fat popular keywords. "Sofa" might get 50k clicks, but the people searching for "Black modern leather sofa" will probably be a better match.
I then clicked the "optimize my campaign" button. Suddenly my clicks went up, and my impressions went up... but no one left their email. I think the trick to advertising on Google is to target niches, and scale up "manually". I also think there's something to targeting the long tail keywords rather than the fat popular keywords. "Sofa" might get 50k clicks, but the people searching for "Black modern leather sofa" will probably be a better match.