What is SEO?

September 18, 2025

SEO

SEO, or Search Engine Optimization, is the process of optimizing your website so that it ranks higher in search engines like Google. The goal is to attract qualified traffic without paying for advertising. Many businesses are asking the question, what is SEO, because it has become one of the most important disciplines in digital marketing.

SEO can best be understood as a long-term investment: Once you achieve good rankings, they can generate traffic, leads, and sales for months or years to come – without you having to pay for each click.

What does SEO actually mean?

SEO stands for Search Engine Optimization, which in Danish is called search engine optimization. It is about making your website more visible and understandable for both users and search engines.
An example:
Imagine that you have a webshop that sells sustainable coffee cups. If you optimize your page for keywords like reusable coffee cupsor sustainable coffee cup, the chance that your webshop will appear when a potential customer searches for just that increases.
The difference between SEO and advertising is important to understand:
- SEO creates free, organic traffic.
- Advertising gives quick results, but requires a budget.

Why is SEO important for your business?

SEO is the key to visibility in the digital age. When your business is at the top of Google, three things happen:
- More traffic: Your website attracts more visitors without you paying for clicks.
- Better conversions: Visitors are already interested in your product or service.
- Long-term value: The results can last for a long time if you maintain your efforts.
A good example is a local dental clinic: By optimizing for keywords like dentist Copenhagenthey can get a constant stream of new customers over time – without spending money on ads every month.

The three main pillars of SEO

On-page SEO – is about the content and structure of your page:
- Seoword optimization of texts.
- Meta tags and headings that match users’ searches.
- A healthy internal link structure so that Google can find its way around.
Off-page SEO – external signals that show that your site is trustworthy:
- Links from other websites (link building).
- Social mentions and PR.
- Recommendations or reviews that point back to your brand.
Technical SEO – the foundation of your entire presence in search engines.
Technical SEO can be compared to the bottom of the SEO pyramid: it is the foundation on which everything else is built. If the technique is not in order, even the best content can struggle to rank.
Here are some of the most important technical points to focus on:
- Website structure – a logical structure that makes it easy for both users and Google to find content.
- User experience – a meaningful design, clear navigation elements and an intuitive structure.
- Page speed – your website should load quickly, both on desktop and mobile.
- Data and security – correctly set up structured data and a secure HTTPS connection.
When working with technical SEO, it’s a good idea to keep an eye on tools like Google PageSpeed Insights or SEO Health Score. The closer your page is to a 100% Health Score, the better the foundation for creating visibility in Google and giving your visitors a good experience.

How to work with SEO in practice

Implementing SEO requires a combination of strategy and persistence:

Keyword Analysis: Find out what words your target audience uses. Tools like Google Keyword Planner can help.
Content Optimization: Write texts that answer users’ questions – not just for Google, but also for your customers.
Technical Review: Make sure your site has a sound structure, fast loading times, and a high Health Score. It is the very foundation that makes it possible to exploit the potential of content and link building.
Ongoing follow-up: SEO is not a one-time task. Use Google Analytics or Search Console to adjust your strategy.

Example: A webshop that sells sportswear can start by optimizing category pages like women’s running shoes. Subsequently, they can write blog posts about how to choose the right running shoes, which both attracts traffic and strengthens authority.

The difference between SEO and paid advertising

Both SEO and Google Ads generate traffic – but in different ways:

SEO: Free clicks, long-lasting results, but takes time.
Google Ads: Quick visibility, but stops when you stop paying.

In practice, they complement each other well. Many companies use advertising for quick traffic and SEO to build long-term visibility.

Typical mistakes and pitfalls in SEO

Even small mistakes can cost you dearly in rankings:

Over-optimization: When keywords are used unnaturally many times.
Ignoring technical SEO: For example, slow pages or lack of mobile optimization.

Poor user experience: If users don’t find value, they quickly click away – and Google punishes them.

The Future of SEO

SEO is constantly evolving in line with Google’s algorithms and changes in user behavior. Artificial intelligence and voice search are playing a bigger role, and this requires a more holistic approach to digital marketing.

In the future, it will be even more important to think of SEO as part of an overall digital strategy, where channels, content and technology work together.

5 tips for success with SEO

If you want to ensure the best results with your SEO work, here are five basic tips:

Do a thorough keyword analysis – understand what your target audience is searching for.
Create valuable content – write texts that answer questions and provide real value.
Ensure technical health – a fast, mobile-friendly and user-friendly website is essential.
Build authority through links – quality links from other sites increase your credibility.
Measure and adjust continuously – SEO is a process where you constantly optimize based on data.

What does SEO mean?

SEO stands for Search Engine Optimization and is about optimizing your website so that it ranks higher in search engines like Google.

How long does it take to see results with SEO?

SEO is a long-term strategy. Typically you can see the first results after 3-6 months, but it depends on the competition, industry and your efforts.

What does SEO cost?

The price of SEO varies depending on whether you do it yourself or work with an agency. It can range from a few thousand kroner per month to much larger investments – it all depends on your ambitions.

Why is SEO important for businesses?

Because SEO creates visibility where potential customers are looking for your products or services. It generates traffic, leads, and long-term value.

Can you combine SEO and Google Ads?

Yes – in fact, it is often the most effective solution. SEO provides long-term value, while Google Ads ensures quick visibility.

What is the difference between on-page and off-page SEO?

On-page SEO is about optimizing the content and structure of your own website. Off-page SEO is about links, mentions, and authority outside of your site.

Frederik Krøl Larsen

CCO & Partner

Frederik er CCO & Partner hos Acend. Hans fornemmeste opgave er, at holde et højt kommunikationsniveau mellem kunder og konsulenter, samt levere solide SEO strategier og holde os opdateret på den altid ændrende Google algoritme.

Do you want more organic traffic?

We are happy to look into your case. Contact us if you want to increase your online presence with SEO.