If you’re running Google Ads (or thinking about it), you’ve probably asked yourself: “How many keywords per ad group is too many?” Or too little?
Good question. And an important one.
The structure of your Google Ads campaign can make or break your results. A lot of people think more keywords = more visibility = better results. But that’s not always true. In fact, stuffing too many keywords into a single ad group can confuse Google’s algorithms—and worse, confuse your customers.
Let’s break it down.
In Google Ads, an ad group is a container for your keywords, ads, and landing pages. It’s like a mini-campaign inside your campaign.
Each ad group targets a set of closely related keywords and shows specific ads that match those keywords. The goal? Keep everything super relevant so the searcher sees the most useful result—and you get a better Quality Score (Google’s measure of ad relevance, CTR, and landing page experience).
Want to brush up on Quality Score? Check out Google’s official guide.
There’s no exact number—but the golden rule is:
Keep it between 10 to 20 highly relevant keywords per ad group.
Now, that doesn’t mean you can’t go above 20. Some PPC experts even go up to 30–40 in very specific cases. But if you’re just starting out or optimizing a messy campaign, aim for fewer, more targeted keywords.
1. Better Ad Relevance: Fewer keywords = more control. Your ads can be written to match the exact intent behind each keyword group.
2. Improved Quality Scores: Higher relevance means better Quality Scores → Lower cost per click (CPC) → Better ROI.
3. Higher Click-Through Rates (CTR) When ads feel tailored to a searcher’s query, they’re more likely to click.
4. Easier to Optimize With fewer keywords, it’s simpler to track performance and tweak your ads and landing pages.
There are situations where having more keywords can make sense:
● If all your keywords are variations of the same core intent (e.g., “buy black running shoes,” “purchase black sneakers,” “black trainers online”).
● If you’re using broad match types to cast a wider net and you’ve already built in negative keywords to filter out irrelevant traffic.
But even then, always ask yourself:
“Are all these keywords pointing to the same message and offer?”
If not, split them into separate ad groups.
Don’t forget, the number of match types you use can double or triple your keyword count without increasing keyword intent diversity.
Example: If you’re targeting the keyword vegan protein powder, you might have:
● [vegan protein powder] (Exact match)
● “vegan protein powder” (Phrase match)
● +vegan +protein +powder (Broad match modifier)
That’s technically three keywords—but really just one core intent. So match types don’t mean you’re overcrowding. It’s all about intent clustering.
Learn more about keyword match types from WordStream.
Here are a few keyword grouping traps to avoid:
●Dumping 50–100 keywords into one ad group—This makes your ads generic and reduces relevance.
● Mixing unrelated keywords—e.g., “buy shoes online” and “cheap sandals for kids” shouldn’t be in the same group.
● Neglecting ad copy alignment—If your ad text doesn’t reflect the keywords, your CTR (and conversions) will drop.
One of the most popular strategies among advanced advertisers is SKAGs—Single Keyword Ad Groups. These ad groups focus on just one keyword per group, often with different match types.
This method gives you hyper-targeted control over:
● Ad relevance
● Keyword bidding
● CTR and conversion tracking
But be warned—it requires time and precision, especially when managing campaigns with hundreds of keywords. If that’s not feasible, grouping 5–10 related keywords together is still a great approach.
Want to dive deeper into SKAGs? This blog by KlientBoost explains it well.
To wrap it up—don’t obsess over hitting a magic number of keywords. Instead:
● Focus on intent alignment
● Keep your ad copy tight and relevant
● Monitor Quality Scores and CTRs
● Keep things organized so scaling gets easier
If you’re running ads for multiple services or product categories, always split them into separate campaigns or ad groups. It helps with reporting, budget control, and performance clarity.
At Infinutus, we help brands structure their Google Ads campaigns for maximum performance. Whether you’re new to PPC or scaling up, our paid media experts can audit your existing campaigns, suggest keyword grouping strategies, and build laser-targeted ad funnels.
Let’s get your ad spend working smarter. Talk to us today.
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