Vexpower
Prompt engineering

Better prompts start
with a clearer task.

Move from trial and error to a repeatable process. Define what a good response looks like, test your instructions and learn which changes actually help.

Make quality something you can test.

Prompt engineering is the practice of designing and evaluating the instructions you give an AI model. A useful prompt makes the task, context and output requirements explicit. A useful evaluation tells you whether it works beyond a single example.

AI can help explain or draft analysis code, but you still need to validate the data, transformations and outputs yourself. The mmm tools, code and platforms learning path connects this idea to the assumptions, practical checks and next steps.

Work through the marketing mix modeling python guide to check how the method behaves before applying it.

To work through the connected decisions, read Meridian geo data: audit the panel before fitting and Meridian ROI priors: translate experiments carefully.

A practical framework

The five principles of prompting

Principle 01

Give direction

Describe the task, audience and desired style. Include the context a colleague would need to do the job well.

Principle 02

Specify the format

Define the structure, required fields and rules for the response so you can check it consistently.

Principle 03

Provide examples

Show a diverse set of good responses, including awkward cases that a simple instruction might miss.

Principle 04

Evaluate quality

Create a test set, identify errors and compare prompt versions against the same criteria.

Principle 05

Divide the work

Break a complex task into steps you can inspect. Check the intermediate outputs before using the final result.

Try it on a real task

01 / Define Choose an output you can judge For example, a campaign brief with an audience, a proposition and three testable hypotheses.
02 / Compare Keep a small set of test cases Include different audiences and incomplete briefs. Run the same cases against each prompt version.
03 / Improve Change one thing at a time Record which errors improve and which remain. Review factual claims before using the output.

Learn with Mike Taylor and James Phoenix

Connect marketing judgement with practical technical skills. Meet Mike Taylor and James Phoenix, or explore the prompt engineering curriculum .

Turn understanding into practice

Your next step: make a better marketing decision.

Work through realistic business problems with guided lessons, practical templates and simulations.

Choose your learning plan Explore the MMM course See the curriculum before choosing a plan.