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91% of paid clicks are on the top three ads. The side ads are not worth it. I'm not sure how the fourth top ad will perform. (source: Google's AdWords account

• anexprogrammer 11y ago
  Depends. Google's AdWords account team want the maximum spend out of you, not best performance, so up that bid! If you are a small business or one person the main block is simply overpriced - by a long way for many keywords, and is just the brands usually. Top 1 or 2 in the sidebar are usually noticeably cheaper and do bring in a decent amount of clicks for popular keywords. I'd call it the sweet spot for someone bootstrapping or a tiny business. Sure you'll get more clicks bumping to 3rd in the main block, but only if you can afford 24/7 coverage on that keyword. If your budget is limiting display then increasing bid will mean less business overall.