A Shared Budget in Google Ads is basically one pool of money that multiple campaigns can draw from, instead of setting a separate daily budget for each one.
Let’s say you’ve got three campaigns—Search, Display, and YouTube. Instead of giving each one its own budget, you set a shared budget of, say, $50 per day. Google will then figure out the best way to split that $50 across the three campaigns based on where it sees the most potential.
It’s super helpful when:
You want to keep things simple and not have to monitor each campaign’s budget all the time.
You’re not sure which campaign will perform best, so you’re letting Google auto-optimize the spend.
Your campaigns have similar goals (like all driving traffic or conversions).
But heads up—if one campaign performs better than the others, Google might give most of the budget to that one. So if you need precise control, shared budgets might not be ideal.
You can set it up easily in the Shared Library section of your account.
In short: it’s a great tool for flexibility and simplicity, especially when your campaigns are aligned and you're okay with Google making the budget calls.