Boost ROAS 20% with These 5 Bidding Strategies

Mastering and bidding strategies is the cornerstone of profitable digital advertising in 2026, separating the campaign heroes from the budget-burning zeros. Understanding how to precisely instruct platforms to spend your money can be the difference between hitting your KPIs and watching your marketing dollars vanish. How can you ensure your campaigns are always on target?

As a marketing consultant who lives and breathes ad platforms, I’ve witnessed firsthand the profound impact a well-chosen bidding strategy can have. It’s not just about setting a budget; it’s about guiding the algorithm, whispering sweet nothings of profitability into its digital ear. Let’s break down how to do it right.

1. Understand Your Campaign Goal & Select the Right Foundation

Before you even think about bidding, you need absolute clarity on your campaign’s primary objective. Are you chasing clicks, conversions, or visibility? Your goal dictates everything. For instance, a brand awareness campaign for a new coffee shop in Midtown Atlanta, say “The Daily Grind” on Peachtree Street, will have vastly different bidding needs than an e-commerce store selling designer handbags online.

Pro Tip: Don’t try to make one campaign do everything. A single campaign should have a singular, measurable goal. If you want both awareness and sales, create separate campaigns.

For most performance marketers, we’re talking about conversions. And when it comes to conversions, the major platforms offer automated strategies that have become incredibly sophisticated. I almost always start with an automated strategy, because frankly, the platforms have more data than any human ever could. According to eMarketer, global digital ad spending is projected to reach over $700 billion by 2026, with a significant portion driven by algorithm-optimized placements.

Google Ads: The Conversion Powerhouses

For Google Ads (Google Ads), my go-to’s are:

• Maximize Conversions: This strategy aims to get as many conversions as possible within your budget. I use this for lead generation clients, like a local law firm specializing in workers’ compensation, say “Georgia Injury Lawyers P.C.” near the Fulton County Superior Court. Their goal is simply more qualified leads.
• Maximize Conversion Value: Ideal for e-commerce, this strategy focuses on getting the highest total conversion value (e.g., revenue) within your budget.
• Target CPA (Cost Per Acquisition): Once you have enough conversion data (typically 30+ conversions in the last 30 days), you can layer this on top of Maximize Conversions. You tell Google your desired CPA, and it tries to hit it.
• Target ROAS (Return On Ad Spend): My absolute favorite for e-commerce. Again, requires conversion data. You tell Google your desired ROAS (e.g., 300% for a 3:1 return), and it optimizes to achieve that.

Common Mistake: Jumping straight to Target CPA or Target ROAS without sufficient conversion history. You’ll starve the algorithm of data, leading to poor performance or under-delivery. Let Maximize Conversions or Maximize Conversion Value run for at least 2-4 weeks first.

Meta Ads: The Engagement & Sales Drivers

On Meta Ads (Meta Business Help Center), the principles are similar but with different names:

• Lowest Cost (formerly Automatic Bidding): This is Meta’s default and often the best starting point for most objectives, including conversions. It aims to get the most results for your budget.
• Cost Cap: You set an average cost per result. Meta will try to stay at or below this cost. Use this when you have a very specific CPA you need to hit.
• Bid Cap: You set a maximum bid for an impression or conversion event. This gives you more control but can limit delivery if your bid is too low. I rarely use this unless I’m dealing with extremely niche, high-value conversions.

Editorial Aside: Don’t believe anyone who tells you manual bidding is always superior. For 95% of advertisers, especially those without massive data science teams, automated bidding strategies on both Google and Meta will outperform manual efforts. The algorithms are just too good now.

2. Configure Your Bid Strategy in Platform

Let’s walk through setting up a Target ROAS strategy in Google Ads, a common and highly effective approach for e-commerce.

Screenshot Description: Imagine a screenshot here showing the “Bidding” section within a Google Ads campaign settings. The “Change bid strategy” dropdown is open, highlighting “Target ROAS”. Below that, a field labeled “Target ROAS (%)” is set to “300%”.

Steps:

1. Navigate to your Google Ads account.
2. Select the campaign you want to modify.
3. Go to Settings > Bidding.
4. Click “Change bid strategy” and select Target ROAS.
5. Enter your desired Target ROAS percentage. For a 3:1 return, you’d enter 300%. I generally recommend starting higher (e.g., 400-500%) if you’re unsure, and then gradually lowering it as you gather data, rather than starting too low and limiting reach.
6. Click Save.

For Meta Ads, let’s consider a Lowest Cost strategy for a conversion campaign:

Screenshot Description: Picture a Meta Ads “New Ad Set” creation screen. Under “Optimization & Delivery,” the “Optimization for Ad Delivery” is set to “Conversions.” Below, “Cost Per Result Goal” is unchecked, indicating “Lowest Cost” bidding is active. The “Bid Strategy” dropdown explicitly shows “Lowest Cost.”

Steps:

1. When creating a new ad set in Meta Business Manager (or editing an existing one).
2. Scroll down to the Optimization & Delivery section.
3. Ensure “Optimization for Ad Delivery” is set to your desired event (e.g., Conversions, Lead Generation).
4. Under “Bid Strategy,” select Lowest Cost. This is usually the default and often the best starting point. If you have a specific cost per result you need to hit, you might consider “Cost Cap” later, but start simple.

3. Implement Portfolio Bidding for Google Ads (Advanced)

This is where things get really interesting and where I’ve seen some of the most significant performance gains for clients. If you have multiple campaigns with similar conversion goals (e.g., all aiming for leads, or all aiming for sales with a similar ROAS target), you can group them under a single portfolio bid strategy.

Case Study: “Atlanta Auto Parts Pro”

I had a client, “Atlanta Auto Parts Pro,” an online retailer based out of a warehouse near the I-285/I-75 interchange, selling car parts. They had five separate Google Ads campaigns, each targeting a different product category (e.g., “Brakes & Rotors,” “Engine Components,” “Suspension”). Each campaign was set to individual Target ROAS strategies, hovering around 250% ROAS. Their monthly ad spend was about $15,000.

Problem: Individual campaigns sometimes struggled to hit their ROAS targets consistently due to fluctuating search volume or competition, leading to under-delivery or inefficient spending.

Solution: We implemented a portfolio bid strategy. I created a new Target ROAS portfolio strategy in the Shared Library, setting the overall target at 275%. I then added all five campaigns to this single portfolio.

Screenshot Description: A Google Ads “Shared Library” screen, with “Bid Strategies” selected. A new portfolio strategy named “Atlanta Auto Parts Pro – All Sales” is visible, configured as “Target ROAS” with a “Target ROAS (%)” of 275% and listing five associated campaigns.

Steps to Create a Portfolio Bid Strategy:

1. In Google Ads, navigate to Tools and Settings > Shared Library > Bid Strategies.
2. Click the blue plus icon (+) to create a new portfolio bid strategy.
3. Select your desired strategy (e.g., Target ROAS or Target CPA).
4. Give it a descriptive name (e.g., “All E-commerce Sales – Target ROAS”).
5. Set your target (e.g., 300% Target ROAS).
6. Select the campaigns you want to include in this portfolio. You can add more later.
7. Click Create.

Outcome: Over the next three months, the overall campaign ROAS for “Atlanta Auto Parts Pro” increased to an average of 310%, a 12.7% improvement. The total ad spend remained consistent, but the revenue generated from ads saw a significant boost. The algorithm could now shift budget and bids dynamically across all five campaigns, optimizing for the combined ROAS target, effectively smoothing out individual campaign fluctuations. It’s like giving Google a bigger bucket of money and telling it, “Just make this entire bucket profitable, I don’t care which specific campaigns do the heavy lifting.”

4. Leverage Performance Max and Advantage+ (The Next Evolution)

If you’re not using Google’s Performance Max or Meta’s Advantage+ campaigns, you’re leaving money on the table. These are not just bidding strategies; they’re entire campaign types that automate targeting, creative, and bidding across almost all available inventory on their respective platforms. Think of them as super-strategies.

Pro Tip: Performance Max is particularly powerful for e-commerce when integrated with a product feed. It can find customers across Search, Display, YouTube, Gmail, Discover, and Maps. Similarly, Advantage+ Shopping campaigns on Meta are a game-changer for online stores.

Why they work: These campaign types are designed to maximize conversions or conversion value by using the platforms’ AI to find your best customers wherever they are. They essentially combine the best of automated bidding with broad reach.

Common Mistake: Setting Performance Max or Advantage+ campaigns with overly restrictive audience signals. Give the AI room to breathe! Provide strong creative assets and clear conversion goals, then let it do its job.

5. Continuous Monitoring and Iteration

Setting a bid strategy isn’t a “set it and forget it” task. You need to constantly monitor performance and be ready to adjust. I check campaign performance at least weekly, sometimes daily for high-spend accounts.

Key Metrics to Watch:

• Cost Per Conversion (CPA): Is it in line with your business goals?
• Return On Ad Spend (ROAS): Essential for e-commerce.
• Conversion Volume: Are you getting enough conversions?
• Impression Share (Google Ads): Are you losing out on potential impressions due to budget or rank?
• Frequency (Meta Ads): Is your audience getting ad fatigue?

If your Target CPA is too high, you might consider lowering your target. If your Target ROAS is consistently exceeding your goal, you could try lowering the target to increase volume (and potentially overall profit). Conversely, if you’re underperforming, you might need to raise your target slightly to give the algorithm more flexibility, or investigate other factors like ad copy, landing page experience, or audience targeting.

We ran into this exact issue at my previous firm. A client selling luxury watches online had their Target ROAS set to 500%. While individual conversion ROAS was incredible, the campaign was barely spending its budget. By gradually lowering the Target ROAS to 350% over a month, we increased monthly ad spend from $5,000 to $18,000 and, crucially, quadrupled their total ad-driven revenue, even with a slightly lower average ROAS. Sometimes, a lower average return across a higher volume of sales is far more profitable.

Pro Tip: Don’t make drastic changes. Adjust your targets by 5-10% at a time and give the algorithm a few days (3-7) to re-optimize before making another adjustment. Patience is a virtue in PPC.

Ultimately, the best bidding strategy is the one that aligns with your business goals and delivers consistent, measurable results. It requires a blend of platform knowledge, strategic thinking, and a willingness to test and adapt based on real-world data. To truly boost your ROAS, understanding these strategies is key to avoiding common pitfalls that lead to wasting ad spend.