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YouTube has three main ad types: Bumper ads (6 seconds, non-skippable), TrueView in-stream ads (skippable, you pay only if watched 30+ seconds), and Discovery ads (thumbnail links, pay per click). Costs vary two to three times based on targeting and industry. Run a week-long A/B test with low budget to find what works, and retargeting can cut acquisition costs by roughly 30%.
