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What is the difference between SEO and SEA?

SEO is organically improving your position in the search results without paying per click. SEA is paid advertising, where you pay per click to appear at the top.

By Tanguy De Keyzer · Founder & digital strategist

The difference between SEO and SEA lies in paid versus organic. With SEO you work on your website and content so you rank higher naturally in the search results, without paying per click. With SEA you buy visibility through ads and usually pay per click. Both aim at the same search results page, but via a different route.

What are the main differences?

The two channels differ mainly in speed, cost and durability:

  • Speed: SEA delivers visibility almost immediately, SEO builds up over weeks to months.
  • Cost: with SEA you pay per click as long as the campaign runs, with SEO you invest mainly in content and technology.
  • Durability: a strong organic position stays in place even without an advertising budget, while SEA stops the moment you stop the budget.

Do you have to choose between SEO and SEA?

Usually not. They reinforce each other: SEA ensures immediate presence on commercial search terms, while SEO lays the foundation for long-lasting, affordable visibility. What you learn in SEA data about the best-converting keywords, you can use to sharpen your SEO strategy. Conversely, strong organic content helps make your ads more relevant and cheaper.

What fits B2B best?

For B2B the right mix depends on your goal and time horizon. Do you want quick enquiries on a new service? Then SEA makes sense. Do you want to be found structurally on the search terms of your market? Then SEO pays off. At Customer Impact we choose the mix based on what delivers enquiries and revenue, not based on clicks or positions alone. We work only for B2B companies, never for webshops, and always steer on real customers instead of vanity metrics.

Another question about your situation?

Ask away. You will get an honest, concrete answer from Tanguy himself.