Marketing medium to set up

Generate Marketing Campaign ROI Reports

Pulls marketing campaign data from Google Sheets, analyzes performance with GPT-4o, and emails a structured ROI recap.

Verified 2026-07-07

Marketer

What it does

You get an automated email with a structured ROI recap that analyzes your marketing campaign data from Google Sheets using AI to summarize key performance metrics. This process pulls the raw numbers, interprets them, and delivers clear insights without you needing to manually review rows of data.

How it works

When it runs: Run manually · Manual · on demand
How hands-off: Assists you, you do the final step
Setup: An afternoon · about an afternoon
Works with: Google Sheets, OpenAI Chat Model, Code

Tools that fit

Services

Google Sheets : Pull campaign data

LLM

OpenAI Chat Model : Summarize performance data

api

Code : Process logic within n8n

Watch out for

Google Sheets API quotas can be exceeded during bulk processing, so implement pagination and delay logic between requests.
Non-numeric values in metric columns will cause calculation errors, so add validation steps to skip or flag invalid rows before parsing.
LLM hallucinations may invent ROI percentages if the input data is sparse, so explicitly instruct the model to state uncertainty when data is missing.
Schema mismatches between your parser and the LLM output can crash the pipeline, so validate the JSON structure immediately after generation.

Seen in the wild

n8n: Generate Marketing Campaign ROI Reports with Google Sheets, GPT-4o and Emai template

Want this running in your business?

This is what I do. I design and build AI agents like this one, and keep them running. If you want it set up for your team instead of doing it yourself, get in touch.

Get in touch

Who it's for

Built for marketers who'd rather brief an agent than start from a blank doc.

Frequently asked questions

Who is this for?

marketers, or anyone doing marketing work who wants this handled automatically rather than manually.

How long does it take to set up?

An afternoon: plan for about an afternoon to get it running end to end.

Related use cases

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