What is campaign draft and experiments?

Introduction
In Google Ads, Campaign Drafts and Experiments is a powerful feature that allows advertisers to test changes to their existing campaigns in a controlled environment before applying them permanently. Think of it as a “safe testing lab” where you can try different strategies, bidding options, keywords, ad copy, or settings — without affecting the original campaign’s performance until you’re sure the change works. This is extremely useful for advertisers who want to improve campaign performance based on data rather than assumptions.

This tool is especially important when running large-scale or high-budget campaigns for brands like Zara, Skechers, or Myntra, where making the wrong change could impact thousands of impressions or conversions. With Drafts and Experiments, you can test ideas like using a different bidding strategy, targeting a new geographic location, or changing ad schedules — and then only roll them out fully if the test results show improvement.

What Is a Campaign Draft?
A Campaign Draft is an editable version of an existing campaign. It mirrors all of the current settings, including keywords, ads, budgets, and targeting. You can then modify this draft without affecting the original campaign.

The purpose of a draft is to allow you to plan and prepare changes, which you can either:

• Apply to the original campaign after review

• Convert into an experiment to test against the original campaign

For example, if Zara wants to test a new bidding strategy (switching from Manual CPC to Target ROAS) on their “Women’s Summer Collection” campaign, they can first create a draft, make the bidding strategy change in the draft, and then either apply it or run an experiment with it.

What Is a Campaign Experiment?
A Campaign Experiment takes the draft you’ve created and runs it alongside your original campaign to test performance. Google splits the budget and traffic between your original campaign and the experiment based on a percentage you choose (like 50/50 or 70/30).

Both versions run simultaneously, and Google provides separate data on performance so you can compare the results. Once the experiment runs for a sufficient time (usually 2–4 weeks), you can decide whether to:

• Apply the changes to the original campaign

• Convert the experiment into a new campaign

• End the experiment if it underperforms

How to Set Up a Campaign Draft and Experiment

Step 1: Create a Draft

1. Go to your Google Ads dashboard

2. Navigate to the campaign you want to test

3. Click on “Drafts” from the left-hand menu

4. Click the “+” to create a new draft

5. Name your draft (e.g., “Zara – Target ROAS Test”)

6. Click “Create”

7. You’ll now be in the draft view — make the changes you want (e.g., change bidding strategy, edit ads, adjust location targeting)

8. Save your changes

Step 2: Set Up an Experiment

1. Go back to the Drafts screen

2. Next to your draft, click on “Apply” → “Run an experiment”

3. Name your experiment

4. Choose the percentage of traffic and budget to allocate to the experiment

5. Set a start and end date

6. Launch the experiment

Now, Google will run both the original campaign and the experiment in parallel, and you can monitor both using separate reporting views.

What Can You Test With Experiments?

• Bidding strategies (Manual CPC vs. Target CPA or Target ROAS)

• Keyword match types

• Ad copy and extensions

• Audience targeting

• Geographic targeting

• Ad scheduling

• Landing pages

Example: Zara India Campaign Experiment
Zara wants to test whether switching to Smart Bidding (Target ROAS) improves the conversion value from its “Women’s Summer Collection” campaign.

1. They duplicate the campaign using a draft

2. In the draft, they change the bidding from Manual CPC to Target ROAS

3. They run an experiment, splitting traffic 50/50 between the original and the draft

4. After 3 weeks, the experiment shows 25% more revenue per rupee spent

5. Zara then applies the experiment to the original campaign

Benefits of Using Campaign Experiments

• Risk-Free Testing: Test major changes without hurting your existing performance

• Data-Driven Decisions: Make informed decisions based on actual performance metrics

• Controlled Environment: Run tests for specific durations with clear traffic splits

• Flexibility: End, apply, or convert experiments at any time

• Detailed Reporting: Compare results like clicks, impressions, CTR, conversions, cost, ROAS side-by-side

Best Practices for Drafts and Experiments

• Test only one major change at a time to clearly understand what’s affecting performance

• Run experiments for at least 2 weeks (ideally 4) to collect enough data

• Use a balanced traffic split like 50/50 for fair comparison

• Monitor key metrics such as Conversion Rate, Cost/Conversion, ROAS, and CTR

• Avoid making changes to the original campaign during the experiment to maintain accuracy

• Name your drafts and experiments clearly (e.g., “Myntra – New Ad Copy Test”) for easy tracking

Limitations of Campaign Drafts and Experiments

• Only available for Search and Display campaigns (not for Performance Max or Shopping campaigns)

• Can only test changes within the same campaign type

• May not show results quickly if your campaign has low traffic or budget

• Multiple experiments can’t run simultaneously on the same campaign

Conclusion
Campaign Drafts and Experiments in Google Ads give advertisers a powerful and structured way to test changes before implementing them live. Instead of guessing what might work better, you can use data to confirm whether your new strategy improves performance. For large retail brands like Zara, Skechers, or Myntra, this feature is incredibly valuable because it reduces risk and increases ROI. Whether you want to test new bidding, keywords, ads, or targeting, Campaign Experiments let you validate your ideas in a real-world setting — and only commit to what truly works. This makes your advertising smarter, safer, and more strategic