Most Google Ads campaigns don’t fail because of bad ad copy. They fail because of bad keywords.
Pick the wrong terms and your ads appear in front of people who were never going to buy. Pick the right ones — at the right match type, with the right negatives in place — and you’re reaching people moments before they pull out their wallet. The difference in cost efficiency between these two scenarios can be enormous.
This guide walks through PPC keyword research from scratch: what makes it different from SEO keyword research, the types of keywords you need, a step-by-step research process, and the most common mistakes that quietly drain PPC budgets.
Why Keyword Research Is the Foundation of Any PPC Campaign
In Google Ads, every dollar you spend is attached to a keyword. When your keyword list is accurate and targeted, your budget goes toward people likely to convert. When it’s sloppy or too broad, you pay for clicks from people who have no intention of becoming customers.
Unlike organic SEO — where you can rank for a term over time and course-correct — PPC burns budget immediately. A week of poor keyword targeting in a competitive niche can mean hundreds or thousands of dollars spent on irrelevant traffic with no way to get it back.
The good news: thorough keyword research is a one-time investment that pays forward. A well-built keyword list, properly organized into ad groups with matched ad copy, improves your Quality Score (Google’s 1–10 relevance rating), which lowers your cost per click and pushes your ads higher in the results. Better keywords quite literally make every click cheaper.
PPC vs SEO Keywords: Key Differences to Understand
You can’t approach PPC keyword research the same way you’d approach it for SEO — the objectives are different enough to change how you evaluate and select terms.
| Factor | PPC Keywords | SEO Keywords |
|---|---|---|
| Intent focus | Commercial and transactional (buyers) | Informational, navigational, and commercial |
| Volume importance | Less critical — even low-volume, high-intent terms justify bids | Higher volume typically preferred for traffic |
| Cost factor | CPC varies widely; high-volume ≠ best ROI | No direct cost per click |
| Negative keywords | Essential — unwanted clicks cost real money | Not applicable in the same way |
| Match types | Three levels of match precision to control reach | No equivalent mechanism |
| Speed to results | Immediate | Months to build |
For keyword research for SEO, you’re often targeting informational queries to capture top-of-funnel traffic. For PPC, you generally want bottom-of-funnel, high-intent queries — people who are ready to act, not just browse. That means you’ll often skip high-volume informational keywords (like “what is project management software”) in favor of lower-volume, more specific terms (like “project management software pricing” or “buy project management tool online”).
Types of PPC Keywords
Not all keywords in your PPC account serve the same purpose. Understanding the categories helps you build a more strategic keyword list.
Broad Match, Phrase Match, Exact Match
In Google Ads, match types control which search queries trigger your ad. As of 2026, there are three:
Broad match is the widest setting. Google’s AI matches your keyword to queries it considers related, including synonyms, paraphrases, and conceptually related searches. A broad match keyword like project management software might trigger for searches like “team collaboration tools” or “task management apps.” Broad match offers maximum reach but minimum control — it’s best used with Smart Bidding and a strong negative keyword list, and only once you have conversion data to guide the algorithm.
Phrase match is the middle ground. Your ad appears for queries that contain the core meaning of your keyword, typically preserving the order and intent. "project management software" under phrase match would show for “best project management software for startups” but not necessarily for unrelated variations. This gives you reach while keeping intent signals intact.
Exact match is the most precise. Your ad appears only for the specific keyword or very close variants (misspellings, abbreviations, plurals, same-meaning reorders). [project management software] under exact match controls tightly which queries trigger your ad. Exact match terms tend to have the highest conversion rates — you know exactly what someone searched.
A practical budget framework for growth-stage accounts: 50% exact match (proven converters), 35% phrase match (controlled expansion), 15% broad match (discovery, with Smart Bidding and conversion data).
Branded vs. Non-Branded Keywords
Branded keywords include your company name or product name. Bidding on your own brand terms is often worth it — these searches come from people already aware of you, so conversion rates are high and CPCs are typically low (because few competitors bid on your brand name).
Non-branded keywords are where most PPC budget goes and where competitor keyword research becomes valuable. These are generic terms describing what you do: “CRM software,” “accounting tool for freelancers,” “digital marketing platform.” Competition is higher and CPCs climb accordingly, but the volume and audience breadth are much larger.
Competitor Keywords
Bidding on competitor brand names is a legitimate PPC strategy. If someone searches for a competitor, an ad from your brand can appear above or alongside organic results — offering an alternative right when they’re evaluating options.
This approach requires careful ad copy (you can’t falsely claim to be the competitor or misrepresent them) and is most effective when you have a clear differentiator: a lower price, a better feature, or a free trial. CPCs on competitor keywords can be steep, but the intent from searchers is extremely high.
Step-by-Step: How to Do PPC Keyword Research
Step 1 — Start with Seed Keywords
Seed keywords are the foundation — the basic terms that describe what you offer. Start by listing your core products or services from your own perspective, then expand to how your customers describe them.
Good seed keyword sources:
- Your website’s service or product pages
- Your sales team’s notes on what prospects say during calls
- Customer reviews that describe the problem your product solves
- Any existing Google Search Console data showing what queries already drive traffic to your site
Aim for 10–30 seed keywords. They don’t need to be polished — they’re just a starting point.
Step 2 — Use Google Keyword Planner
Google Keyword Planner is the primary free tool for PPC keyword research. Access it through your Google Ads account under Tools → Planning → Keyword Planner.
Key features for PPC research:
- Discover new keywords — enter your seed terms and Google suggests related keywords with search volume, competition level, and estimated CPC
- Get search volume and forecasts — enter a list of keywords to see historical metrics and projected performance
- Filter by location and language — focus on your actual target market, not global averages
When reviewing keyword suggestions, pay attention to the competition column (low/medium/high) alongside the top of page bid ranges. These give you a realistic sense of what you’ll pay. High volume + high competition + high CPC isn’t always worth pursuing when you’re starting — sometimes a cluster of mid-volume, lower-competition terms outperforms one expensive vanity keyword.
Step 3 — Expand with Third-Party Tools
Google Keyword Planner gives you volume estimates, but it rounds numbers significantly and doesn’t always surface the full competitive picture. Third-party tools add depth:
Allable’s keyword research tool is built specifically for marketers who need both SEO and PPC keyword intelligence in one place. It surfaces related keywords, search volume, difficulty scores, and intent signals — letting you build a PPC-ready keyword list without switching between platforms.
SpyFu and SEMrush are strong choices for competitive research — you can enter a competitor’s domain and see which keywords they’re bidding on, along with estimated spend. This is valuable when you’re entering a market and want to understand where established players are investing.
Ahrefs Keywords Explorer is primarily SEO-focused but useful for identifying intent and understanding which queries drive high-value traffic in your category.
For each keyword you’re considering, gather: search volume, estimated CPC, competition level, and search intent. You’ll use this to prioritize in Step 5.
Step 4 — Add Negative Keywords
Negative keywords are terms you explicitly exclude — they prevent your ad from appearing when someone searches a phrase that contains your keyword but isn’t relevant to your business.
Why they matter: Without negative keywords, broad and phrase match can trigger your ads for searches that share words but not intent. If you sell premium project management software, you probably don’t want your ad showing for “free project management software” or “project management software tutorial.” Every irrelevant click costs money.
Common negative keyword categories to build from the start:
- “Free” and “DIY” terms — if you sell paid products or services
- Job-seeker terms — “jobs,” “careers,” “salary,” “internship”
- Research/informational queries — “what is,” “how to,” “definition of” (unless you’re deliberately targeting awareness)
- Competitor product names — unless you’re specifically running competitor campaigns
As of 2025, Google Ads allows up to 5,000 negative keywords per list. Build and maintain your negative keyword list continuously — review your search term reports weekly in the first months of a campaign.
Step 5 — Group Keywords into Ad Groups
The final step is organizing your keyword list into ad groups — thematic clusters that each get their own targeted ad copy.
The rule: one tight theme per ad group. A keyword group about “team task management” should have ad copy and a landing page about team task management — not a generic homepage that mentions task management somewhere on it.
Why this matters: Google’s Quality Score rewards alignment between keyword, ad, and landing page. The tighter the match, the higher your score, the lower your CPC, and the better your position.
A practical approach:
- Group keywords by search intent (someone searching “best CRM software” has different intent than someone searching “CRM software pricing”)
- Keep 5–20 keywords per ad group — enough to have meaningful data, tight enough to write relevant copy
- Write at least 2–3 ad variations per ad group so Google can test which resonates best
How to Evaluate Keyword Relevance for PPC
Having a long keyword list isn’t the goal — having the right keywords is. Here’s how to separate the ones worth bidding on from those that look good on paper but won’t deliver.
Search Volume vs. CPC vs. Competition
These three metrics interact constantly in PPC:
- High volume, high CPC, high competition — the most competitive territory. Can work if your conversion rate and customer lifetime value support it, but expensive to test.
- Low volume, low CPC, low competition — often the sweet spot for early campaigns. Fewer searches, but lower cost to capture them.
- High volume, low CPC — rare and usually a red flag; often signals low commercial intent.
The right balance depends on your budget and your customer’s value. A software company with $5,000 average contract value can justify $50/click CPCs if the conversion rate is 2%. A local business selling $100 products cannot.
Commercial Intent Signals
High commercial intent keywords — the ones most worth bidding on in PPC — tend to include specific signals:
- Action words: buy, get, order, book, hire, schedule, download
- Evaluation words: pricing, cost, plans, reviews, comparison, vs, alternative
- Location modifiers: “near me,” city names, regional terms
- Specificity: “B2B project management software for remote teams” converts at a higher rate than “project management software,” even though it has far lower volume
When building your keyword list, prioritize the terms that demonstrate a decision-making stage — people who’ve already done their research and are choosing between options.
Best PPC Keyword Research Tools in 2026
| Tool | Best For | Free Option? |
|---|---|---|
| Google Keyword Planner | Volume, CPC estimates, forecasts | Yes (Google Ads account required) |
| Allable.ai | Combined SEO + PPC keyword intelligence, intent scoring | Free trial available |
| SEMrush | Competitive keyword research, gap analysis | Limited free tier |
| SpyFu | Competitor PPC campaigns, keyword history | Limited free tier |
| Google Search Console | Finding organic queries to test in PPC | Yes (free) |
| Ahrefs | Keyword difficulty, intent analysis | Limited free via Ahrefs Webmaster Tools |
A practical starting stack for most advertisers: Google Keyword Planner for core research, Allable.ai for intent-level analysis and AI-assisted expansion, and Google Search Console to identify high-performing organic queries worth testing as paid keywords.
Common PPC Keyword Research Mistakes
Targeting keywords that are too broad. “Software” or “marketing” are technically relevant to your product, but the intent is so diffuse that you’ll burn budget on tire-kickers and researchers. Be specific.
Ignoring match types. Defaulting to broad match without a strong negative keyword list is one of the fastest ways to waste budget. Start tighter (phrase and exact), then expand deliberately once you have conversion data.
Skipping negative keywords. This is especially painful in the early weeks of a campaign. Set up a negative keyword list before launch and review search term reports every 3–5 days initially.
Chasing volume over intent. A keyword with 10,000 monthly searches but low commercial intent will consistently underperform a keyword with 500 searches and high purchase intent. Volume is a context metric, not a success predictor.
Not grouping tightly enough. Stuffing 50 loosely related keywords into one ad group and pointing them at a homepage is a Quality Score killer. Tighter groups → better scores → lower CPCs → better results for the same budget.
Forgetting to update. Markets change, competitors change, your offer changes. Your keyword list should be a living document, not a one-time task.
FAQ
What is PPC keyword research?
PPC keyword research is the process of finding, evaluating, and organizing the search terms you want to bid on in paid search campaigns (like Google Ads). The goal is to identify keywords with strong commercial intent that your target audience is actively searching for, at a price your business can support.
What’s the difference between PPC and SEO keyword research?
SEO research often prioritizes volume and informational intent to build long-term organic traffic. PPC research focuses on commercial and transactional intent — reaching people ready to act — and adds match type and negative keyword considerations that SEO doesn’t require.
How many keywords should I have in a Google Ads campaign?
There’s no ideal number, but quality matters more than quantity. A focused campaign with 50–150 highly relevant, well-organized keywords will almost always outperform a campaign with 1,000 loosely themed ones.
What are negative keywords and why do they matter?
Negative keywords are terms you explicitly exclude from your campaigns to prevent your ads from showing for irrelevant queries. They’re essential for protecting budget — especially with broad and phrase match types, which cast a wide net.
Which keyword match type is best for Google Ads?
It depends on your goal and stage. Exact match gives you precision and consistent conversion data. Phrase match lets you expand reach while maintaining intent. Broad match is best for discovery once you have conversion history and Smart Bidding active. Most accounts benefit from using all three deliberately, with budgets weighted toward exact match.
How do I know if a keyword has commercial intent?
Look for action-oriented or evaluation-oriented words in the query: “buy,” “pricing,” “best,” “vs,” “alternative,” “hire,” or location modifiers like “near me.” Run a few searches manually and see what the SERP looks like — if organic results are dominated by e-commerce product pages or pricing pages, commercial intent is high.
Build a PPC Keyword List That Actually Converts
PPC keyword research isn’t glamorous, but it’s the work that separates campaigns that drain budget from ones that scale profitably. Every hour you invest upfront in finding the right keywords, setting the right match types, and blocking the wrong queries directly translates into lower CPCs and higher ROI.
The process doesn’t have to be complicated. Start with your seed keywords, use the right tools to expand and evaluate, tighten your ad groups, and keep your negative keyword list current.
Allable.ai’s AI-powered keyword research works for both SEO and PPC — giving you intent signals, search volume, and competitive data in one place, whether you’re building organic content or a Google Ads campaign. Start for free and see what keywords your competitors are missing.
If you’re new to paid search, start with our what is PPC advertising guide before diving into the keyword research process — it’ll give you the strategic context to make better decisions at every step.