Manual extensions require you to fill out additional information. Automatic extensions do not.

• Automatic extensions require setup. Manual extensions do not.
• Manual extensions cost more than automatic extensions
• There is only one type of manual extension but many types of automatic extensions
• Manual extensions require you to fill out additional information. Automatic extensions do not.

The correct Answer is: Manual extensions require you to fill out additional information. Automatic extensions do not.

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Explanation: : Manual extensions different from automatic extensions. Manual extensions require you to fill out additional information. Automatic extensions do not. Many extension types require a bit of set-up—those are manual. Some extensions are added automatically when Google Ads predicts they’ll improve your performance—those are automated. No setup is required for automated extensions, so they don’t show up among your options when you’re creating manual extensions.

Read more here: https://support.google.com/adwords/answer/2375499