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Select Existing Ads from Admanage Library

Load your existing ads by clicking the Load Media button
Select the existing ads you want to launch
You can hold shift to select multiple files
Click Use Post Id/Creative Id

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Select Existing Ads from Meta Ads Manager

Load your existing ads by clicking the Load Media button
Click Existing Ads tab
Select the existing Meta ads you want to launch

You can search for specific Meta ads by name

That’s it! You can now launch your ads with existing Post ID / Creative ID and keep social proof and engagement.