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Keyword Research for Google Ads: The Ultimate Guide

Patrick LotteNovember 25, 202510 min read
Keyword research

Keyword Research: The Foundation of Success

The right keyword research is the foundation of every successful Google Ads campaign. In this article I share my approach as a Google Ads expert.

Why is keyword research important?

Good keywords:

  • Reach the right audience
  • Have a healthy balance between volume and competition
  • Lead to conversions, not just clicks
  • Match your budget - see average costs by industry

Step 1: Brainstorm

Start by gathering keywords:

  • What would customers search for?
  • What problems do you solve?
  • What products/services do you offer?

Step 2: Use tools

Free tools:

  • Google Keyword Planner
  • Google Trends
  • Google Search Suggestions (autocomplete)

Paid tools:

  • SEMrush
  • Ahrefs
  • Ubersuggest

Step 3: Analyze search intent

Not all keywords are equal. Analyze the intent:

IntentExampleValue
Informational"what is SEA"Low
Navigational"Google Ads login"Low
Commercial"compare Google Ads experts"High
Transactional"hire Google Ads expert"Very high

Want to better understand what SEA is? Read our SEA marketing guide for beginners.

Step 4: Analyze competition

For each keyword, look at:

  • Who is already advertising?
  • What is their ad copy?
  • How much does a click cost (estimated CPC)?

Step 5: Group keywords

Organize your keywords by theme:

  • 1 ad group = 1 theme
  • 10-20 keywords per group
  • Relevant ads per group

Ready to set up your campaign? Follow our step-by-step guide.

Long-tail vs short-tail

Short-tailLong-tail
"SEA""Google Ads expert for e-commerce"
High volumeLow volume
High competitionLow competition
Low conversionHigh conversion

Tip: As a Google Ads expert I often focus first on long-tail keywords for faster results at lower costs.

Negative keywords

Just as important as your target keywords:

  • Exclude irrelevant searches
  • Save budget for relevant clicks
  • Improve your Quality Score - learn how here

Read more about negative keywords in our complete guide on negative keywords.

Frequently Asked Questions

Which tools are best for keyword research?

The Google Keyword Planner is the best free option because it uses direct data from Google. For more extensive analyses, SEMrush and Ahrefs are popular, but for most SMBs the free Keyword Planner combined with Google Trends is sufficient.

How many keywords do I need per campaign?

Start with 10-20 keywords per ad group, grouped around one theme. Too many keywords per group reduces relevance. A complete campaign often has 3-10 ad groups, so 30-200 keywords total.

How do I know if a keyword is too competitive?

Look at the estimated CPC in Keyword Planner. If it's higher than you can justify in conversion value, focus on long-tail variants. Often you can find cheaper alternatives with "[product] + [location]" or "[product] + [specification]".

Get in touch for a free keyword analysis for your industry.

Need help with your Google Ads?

As a Google Ads expert with 17+ years of experience, I help you get more from your ad budget. Request a free audit and discover where you can save.