What is a shared budget strategy?

Introduction
A Shared Budget Strategy in Google Ads is a budgeting method that allows advertisers to allocate a single budget across multiple campaigns in the same account. Rather than setting individual daily budgets for each campaign, you create a shared budget pool, and Google automatically distributes that budget across your selected campaigns based on which ones are performing best or have the potential to get more traffic.

This strategy is especially helpful for businesses that want to simplify budget management and make sure their ad spend is used efficiently across several campaigns. For example, brands like Myntra, Zara, or Skechers, which often run multiple campaigns for different products or seasonal offers, can benefit from using a shared budget to ensure they are not over- or under-spending on any individual campaign.

How It Works
When multiple campaigns are grouped under a shared budget:

• Google monitors all the campaigns using that shared budget

• Each day, it automatically reallocates the budget based on performance and demand

• If one campaign doesn’t use its portion of the budget (due to low traffic or low spend), Google can shift those unspent funds to another campaign that can make better use of it

For example, if you assign a shared budget of ₹2,000/day across three campaigns — Campaign A, B, and C — and on a particular day:

• Campaign A only uses ₹500

• Campaign B uses ₹700

• Campaign C uses ₹800
  Then the entire ₹2,000 is spent without any budget being wasted or unspent.

Benefits of Using a Shared Budget

1. Simplifies Budget Management
   Instead of manually assigning budgets to each campaign, you can manage everything from one shared pool.

2. Maximizes Budget Efficiency
   Google automatically shifts unused budget from underperforming campaigns to high-performing ones, helping you get the most out of your daily spend.

3. Reduces Underspending
   If one campaign is low on traffic, the remaining budget isn’t wasted — it’s used where it’s needed.

4. Improves Campaign Flexibility
   You can run multiple related campaigns (like for different product categories) under one budget without micromanaging each individually.

5. Helpful for Seasonal Campaigns
   During sales, events, or product launches, shared budgets let you react faster to performance shifts without daily manual adjustments.

How to Set Up a Shared Budget

1. Log in to your Google Ads account

2. Click on Tools & Settings (wrench icon)

3. Under Shared Library, select Shared budgets

4. Click the + button to create a new shared budget

5. Name your shared budget (e.g., “Zara Women’s Apparel Budget”)

6. Set a daily budget amount for the shared group

7. Choose the campaigns you want to include

8. Click Save

From that point, the selected campaigns will all draw from the shared pool instead of using their previous individual budgets.

Example: Zara Shared Budget Strategy
Suppose Zara is running three campaigns:

• Campaign 1: Dresses

• Campaign 2: Footwear

• Campaign 3: Accessories

Rather than assigning ₹800 to each, they create a shared budget of ₹2,400 for all three. If Campaign 2 is getting higher traffic due to a flash sale, Google can allocate ₹1,200 to it for the day while reducing the others. This ensures Zara doesn’t miss out on valuable clicks just because one campaign hit a fixed budget limit.

When to Use Shared Budgets

• When you’re running multiple campaigns targeting similar products or goals

• When you want Google to automatically allocate spend based on performance

• When your campaigns have similar priority and you don’t want to limit one unnecessarily

• When you have a limited daily budget and want to ensure it’s spent effectively

• When managing a large-scale account with many campaigns and minimal manual intervention

When Not to Use Shared Budgets

• If you want precise control over how much each campaign spends

• If your campaigns serve very different goals, audiences, or regions

• If you use automated bidding strategies that require separate budgets

• If you’re testing performance separately, like in campaign experiments

Tips for Optimizing Shared Budgets

• Group only similar campaigns together — campaigns targeting the same country, similar product lines, or similar goals

• Monitor performance daily, especially at the beginning, to ensure one campaign isn’t hogging the budget

• Use portfolio bid strategies together with shared budgets to maximize performance

• Regularly evaluate if certain campaigns have grown and now need their own individual budgets again

• If a campaign is underperforming, pause it or remove it from the shared budget pool to prevent it from using valuable budget

Conclusion
A Shared Budget Strategy is a smart and efficient way to manage multiple campaigns under a single spending umbrella in Google Ads. It ensures that your daily budget is fully utilized and automatically adjusted based on demand and performance. For large retail brands like Zara, Skechers, and Myntra, shared budgets help simplify account management, improve ad spend efficiency, and enhance campaign flexibility — all while reducing the risk of underspending or over-prioritizing low-performing ads. When implemented wisely, shared budgets can contribute significantly to more agile, cost-effective, and profitable advertising campaigns.