What is SEA? Search engine advertising explained for 2026

You’ve probably come across the term before: SEA. Perhaps in a conversation with a marketer, or perhaps in a quote from an agency. But what exactly does it mean, how does it work, and is it right for your business? We’ll explain it clearly, without beating about the bush.

What is SEA?

SEA stands for Search Engine Advertising. It is the umbrella term for purchasing advertising space on search engines such as Google or Microsoft (Bing). In practical terms: you pay to appear at the top of the search results when someone enters a relevant search query. That result is labelled ‘Sponsored’, so that users know it is a paid listing.

A simple example: suppose you run a plumbing business in Rotterdam. Someone types ‘plumber Rotterdam emergency’ into Google. With SEA, you ensure that your business appears right at the top, above the organic (free) search results. You only pay when that person clicks. This system is called Pay-Per-Click, or PPC for short.

How does SEA work from a technical point of view?

In practice, SEA almost always revolves around Google Ads. Google determines which advert appears at the top via an auction system. This system is called Ad Rank and works as follows:

• Your maximum CPC bid (the maximum amount you’re willing to pay per click)
• Your Quality Score (a score from 1 to 10 based on ad relevance, expected click-through rate and landing page experience)
• Your ad position is determined by the product of your bid and your quality score

This means that the largest budget does not automatically guarantee the best position. An advertiser with a highly relevant advert and a fast-loading landing page can outperform a competitor with a higher bid. Google itself doesn’t earn anything from adverts that nobody clicks on, so it’s in Google’s interest to show the most relevant adverts. That is precisely why the Quality Score carries such significant weight.

Campaign types in Google Ads

Google Ads has long since ceased to be a simple keyword platform. In 2026, you can choose from several campaign types, each with its own function:

• Search Ads: traditional text adverts in search results, targeting direct intent
• Shopping Ads: product adverts featuring an image and price, popular in e-commerce
• Performance Max: automated campaigns that run simultaneously across all Google channels (Search, Display, YouTube, Gmail, Maps)
• Demand Gen: aimed at generating demand amongst people who are not yet actively searching
• Display Ads: visual banners on websites in the Google Display Network
• YouTube Ads: video adverts for brand awareness and remarketing

In 2025, Google introduced the so-called ‘Power Pack’: a combination of Performance Max, Demand Gen and AI Max. These three campaign types are designed to work together to cover the entire customer journey, from initial awareness to direct conversion.

How much does SEA cost in the Netherlands?

The cost per click (CPC) varies enormously depending on the sector and keyword. There is no fixed price: the market determines what a click is worth via the auction system. Here are a few indicative figures for the Dutch market in 2026:

• Local searches (hairdresser, bakery, car repair shop): on average €0.40 to €1.20 per click
• Hospitality sector: an average of around €2.05 per click
• Retail and e-commerce: €1.50 to €3.49 per click, depending on the product category
• Lawyers and legal services: an average of €8.58 per click
• Mortgage advice, personal injury claims and business insurance: €15 to €35 per click

The rule of thumb is simple: the higher the customer value, the more advertisers are willing to pay per click. A solicitor overseeing a merger can easily recoup the cost of a single click worth €8. A restaurant simply doesn’t have that kind of margin.

As for the total monthly budget: most small Dutch businesses spend between €500 and €2,000 per month on the advertising budget itself. On top of that, there are management fees charged by a specialist or agency, usually €250 to €500 per month. If you add these together, you’re looking at €750 to €2,500 per month for a substantial campaign.

The difference between SEA and SEO

SEA and SEO are often mentioned in the same breath, and rightly so: both are about visibility in search engines when someone is searching for something. But the way in which you achieve that visibility is fundamentally different.

• SEO (Search Engine Optimisation): you work on content, technical aspects and authority to improve your organic rankings. This takes time – sometimes months – but the visibility you build up is long-lasting and costs nothing per click.
• SEA: you buy the top positions straight away. You’ll be visible on the very same day, but as soon as your budget runs out, the traffic stops immediately.

In short: with SEO, you earn visibility; with SEA, you buy it. This makes SEA ideally suited to situations where speed is of the essence: product launches, seasonal promotions, or markets where organic competition is so fierce that SEO alone would take years. SEO is the better choice if you want to build a sustainable, scalable channel that isn’t charged per click.

A combination of both is most effective. If you rank at the top for the same search query both through paid advertising and organically, it’s almost impossible for a potential customer to miss you. What’s more, SEA data provides concrete insights into which keywords actually convert – information you can use straight away to inform your SEO strategy. See also our guide on search engine optimisation (SEO) as a good starting point.

AI and automation: what SEA will look like in 2026

SEA has changed dramatically in recent years as a result of AI. Manual bidding on individual keywords is a thing of the past for most advertisers. Google has largely handed over its bidding systems to machine learning, via Smart Bidding. The most relevant developments at the moment are:

Smart Bidding and Smart Bidding Exploration

Smart Bidding is Google’s umbrella term for automated bidding strategies such as Target CPA (cost per acquisition) and Target ROAS (return on ad spend). The system adjusts your bid for each auction based on hundreds of signals: device, location, time of day, search query and historical behaviour.

In 2025, Google launched Smart Bidding Exploration for Search campaigns. This is an extension whereby Google also bids on search queries that fall just outside your usual ROAS target, provided a conversion is still expected. This has since been extended to Performance Max campaigns. Results reported by Google itself: an average of 27% more unique converting users for Search campaigns that enable the feature.

Journey-Aware Bidding

Another new feature is Journey Aware Bidding. Whereas the old system viewed a form submission or purchase as the end point, the new system also tracks what happens next: did that lead actually result in a deal? Was that phone call from a genuine prospect? Google shifts the budget to days with higher expected demand. Advertisers who make full use of this feature report up to 66% fewer manual budget adjustments.

AI Overviews and Advertisements

In 2025, Google rolled out adverts in AI Overviews, initially only on mobile in the US, then on desktop and in several other markets. AI Overviews are the AI-generated summaries that appear at the top of search results. Adverts are integrated into them, directly within the text. This changes the way search results look and has implications for both your SEA and SEO strategies. Read more about how AI Overviews are based on Google’s own documentation.

End of Enhanced CPC

As of 25 March 2025, Google has discontinued the Enhanced CPC bidding strategy. Campaigns that were still running on this strategy have been automatically switched to manual CPC. This is a clear indication that Google is moving firmly towards fully automated bidding strategies. Anyone starting with SEA today would be well advised to use Target CPA or Target ROAS straight away.

When does SEA make sense for your business?

SEA isn’t necessarily the obvious first step for every business. However, there are situations where it almost always pays off:

• You want to be visible quickly, without having to wait months for organic results
• You’re launching a new product or service and need immediate traffic
• You operate in a seasonal market (holidays, St Nicholas, the construction sector)
• You’re selling something with a relatively high customer value, which means the cost per click is recouped quickly
• You want to target specific audiences by location, device or time of day
• You have an online shop and want to generate conversions straight away via Shopping Ads

To be honest, we’re also open about the downside here. With SEA, there’s a direct link between budget and results: as soon as you stop paying, the traffic stops. That’s the fundamental difference compared to a well-optimised SEO strategy, which continues to generate traffic even when you’re not actively working on it. Anyone using SEA without sufficient conversion optimisation on their landing pages is throwing money down the drain. Buying the click is the first step; convincing visitors with what’s on the page afterwards is the real challenge.

Microsoft Advertising: the sensible alternative

Google has a market share of around 90% in the Netherlands. This makes Google Ads the priority for most advertisers. However, Microsoft Advertising (formerly Bing Ads) is worth a mention: click prices there are often substantially lower than on Google, whilst the quality of search traffic in B2B segments is surprisingly high. Bing is used relatively more often on desktop and by a slightly older, affluent target audience.

What’s more, importing an existing Google Ads campaign into Microsoft Advertising takes just a few clicks. If you already have a Google campaign that’s performing well, trying out Bing is a logical, straightforward next step. Take a look at the official Microsoft Advertising import tool as a starting point.

Should you carry out SEA in-house or outsource it?

That’s a frequently asked question, and the answer depends on your budget and time. Managing Google Ads yourself is technically possible, but don’t underestimate the learning curve. The interface is complex, there’s a wide range of options, and a single incorrect setting will cost you money straight away. If your monthly budget is under €1,000, it’s worth learning the basics yourself via Google Skillshop. For amounts above €1,000 per month, outsourcing to a specialist is generally more efficient: a good manager prevents waste and continuously optimises operations based on data.

At SEO Ninja, we use Google Ads as part of a broader online strategy. This means we link campaign data directly to your analytics and SEO insights, so that SEA and SEO reinforce each other rather than running in parallel. No silos – just a single, integrated approach.