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Merge Lists takes multiple separate lists and combines them into one unified list. Essential for consolidating data from different sources, combining campaign results, or preparing merged datasets for processing.

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When to Use It

  • Combine campaign lists from different advertising platforms
  • Merge client data from multiple spreadsheets
  • Consolidate URL lists from various sources
  • Unify keyword lists before processing

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Inputs

FieldTypeRequiredDescription
Lists to MergeMultiple ListsYesAdd multiple lists that you want to combine into one

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Outputs

OutputDescription
Merged ListSingle list containing all items from the input lists

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Credit Cost

Free to use - no credits required.

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How It Works

Takes multiple lists and combines them in the order you provide them: Example: 
List 1: ["Campaign A", "Campaign B"]
List 2: ["Campaign C", "Campaign D"] 
List 3: ["Campaign E"]
Merged Result: ["Campaign A", "Campaign B", "Campaign C", "Campaign D", "Campaign E"]
Items are added in sequence - first all items from List 1, then all from List 2, and so on.

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Real-World Examples

Unified Cross-Platform Reporting: 
Google Ads Get Report (campaign performance data) → List 1
Meta Ads Get Report (campaign performance data) → List 2
LinkedIn Ads Get Report (campaign performance data) → List 3
→ Merge Lists → Write to Sheets
"Create one master report with all platform data in a single table"

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Best Practices

Order Matters:
  • Lists are merged in the order you add them
  • First list items appear first in the merged result
  • Consider priority when arranging your lists
Data Consistency:
  • Ensure all lists contain similar types of data
  • Mixed data types work but may complicate later processing
  • Consider standardizing formats before merging
Post-Merge Processing:
  • Often useful to use Remove Duplicates after merging
  • Count List Items to verify expected total
  • Consider splitting large merged lists for processing

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FAQ

Yes, items maintain their order within each list, and lists are combined in the sequence you provide them. List 1 items come first, then List 2 items, etc.
Duplicates are preserved in the merged list. If List 1 has “Campaign A” and List 2 also has “Campaign A”, the merged list will contain both. Use Remove Duplicates afterward if needed.
Yes, you can merge lists containing different types of data (text, numbers, etc.). However, ensure your downstream processing can handle the mixed data types appropriately.
You can add multiple lists to merge. The practical limit depends on your system’s memory and the size of the individual lists being combined.
Empty lists are handled gracefully - they simply don’t contribute any items to the merged result. The merge will continue with the non-empty lists.
Merging creates a single list that can be processed as one unit in subsequent nodes like Loop Over List, whereas separate lists would require separate processing chains.
Usually after merging, as you want to see the full scope of duplicates across all your source lists. Removing duplicates before merging might miss cross-list duplicates.
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