You should duplicate, not export, your winning ads or ad sets into an Advantage+ Shopping Campaign (ASC).
Here’s the correct process:
1) Identify winning assets
Look for high-performing creatives or ad sets from your broad prospecting campaigns (manual).
Focus on those with strong ROAS, low CPA, and stable performance.
2) Create a new ASC campaign
Use the Sales objective.
Broad targeting is key—this is what triggers the ASC behavior in the new campaign flow.
You can now run multiple ad sets in ASC (per the recent update), so structure accordingly.
3) Duplicate into ASC
In Ads Manager, use the “Duplicate” function to copy the winning ad(s) directly into the new ASC campaign.
Do not export/import—it’s unnecessary and may create formatting issues or miss key campaign settings.
4) Set campaign budget (CBO)
ASC is designed to work best with campaign-level budgets for optimal performance distribution.
5) Exclude audiences as needed
With the new update, you can now exclude custom audiences inside ASC—use this to avoid targeting existing customers if you're prospecting.
6) Run in parallel before pausing your original campaign
Let both campaigns run for 7–10 days to evaluate performance before you decide to scale one or turn off the other.