CMS
A CMS (Content Management System) is software for creating, editing and publishing content on a website without writing code. In the admin panel you add posts, pages, images or products, and the system places them in the site's template itself. According to W3Techs, as of November 2026, 67.1% of websites use one of the content management systems it monitors. The most popular of them is WordPress.
How does a CMS work?
A CMS separates a site's content from its appearance. Text, images and settings go into a database, and the template decides how they are displayed. As a result, changing content does not require touching the code, and changing the template does not delete the content.
A typical CMS consists of three elements:
- the admin panel – where editors add and edit content,
- the database – stores content, users and settings,
- the presentation layer – the template that turns data into a finished page visible to visitors.
Most systems also let you assign roles and permissions to users. Features are extended with plugins or apps, e.g. with forms, a shop or SEO tools.
What types of CMS are there?
Content management systems differ in how they are installed, hosted and how they display content:
| Type | How it works | Examples |
|---|---|---|
| traditional (open source) | installed on your own server, combines the panel, database and template | WordPress, Joomla |
| hosted (SaaS) | runs in the provider's cloud on a subscription model | Wix, Squarespace, Webflow |
| e-commerce | specialised in running an online shop | Shopify, WordPress with WooCommerce |
| headless | stores content and serves it via an API, without its own display layer | e.g. Contentful, Strapi |
An open-source CMS gives more control but requires looking after hosting, updates and security. A SaaS system takes over these tasks in exchange for a fixed fee and less freedom to make changes.
Which content management systems are the most popular?
W3Techs regularly surveys which systems websites use. Data as of 14 November 2026:
| CMS | Share of all websites | CMS market share |
|---|---|---|
| WordPress | 38.7% | 57.6% |
| Shopify | 5.4% | 8.1% |
| Wix | 4.2% | 6.2% |
| Squarespace | 2.4% | 3.6% |
| Joomla | 1.0% | 1.6% |
| Tilda | 0.8% | 1.2% |
| Webflow | 0.8% | 1.2% |
| Duda | 0.7% | 1.2% |
The remaining 32.9% of websites use none of the monitored systems. These include sites coded from scratch or built on less popular solutions.
How does a CMS affect SEO?
A CMS determines how easy it is to optimise a site. A good system lets you edit, among other things:
- page titles and meta descriptions,
- URLs and redirects,
- headings and image alt texts,
- the sitemap and structured data.
Some of these features are built in, and some are added by SEO plugins. Page speed also matters, and you can check it in PageSpeed Insights or Google Lighthouse. Heavy templates and too many plugins can lower it.
A CMS should also make it easy to integrate marketing tools. This means, for example, Google Tag Manager, verification in Google Search Console or product feeds for Google Merchant Center. CMS settings are worth checking as part of an SEO audit.
How do you choose a CMS?
The choice depends on the site's purpose and the company's resources. When comparing systems, consider:
- type of site – a blog, company website, shop or multi-channel service,
- costs – licence or subscription, hosting, plugins and developer work,
- ease of use – whether editors can manage without technical help,
- SEO capabilities – control over meta tags, URLs and speed,
- security and updates – who is responsible for patches and backups,
- integrations – with analytics, payment systems or CRO tools.
Changing your CMS in the future means migrating content and URLs. That is why the choice is worth thinking through in advance.
Sources
- W3Techs, “Usage Statistics and Market Share of Content Management Systems”, as of 14 November 2026. w3techs.com
Frequently asked questions
Q.What does CMS stand for?
CMS stands for Content Management System. It is software in which you create, edit and publish content on a website without writing code. In a CMS panel you add, among other things, posts, pages, images and products. The site's appearance is defined by a template, which the system combines with content from the database.
Q.Is WordPress a CMS?
Yes. WordPress is the most popular CMS in the world. According to W3Techs, as of November 2026 it runs 38.7% of all websites. That is 57.6% of the CMS market. Its capabilities are extended with plugins, e.g. WooCommerce adds online shop features. The site's appearance is changed with themes.
Q.What is a headless CMS?
A headless CMS is a system that stores and serves content but is not responsible for displaying it. Content goes via an API to a website, mobile app or another channel. Developers build the visual layer independently. This approach requires more technical work but makes it easier to publish the same content in many places.
Q.Can a website without a CMS rank well?
Yes. Search engines assess a site's content and technical side, not whether it runs on a CMS. According to W3Techs, 32.9% of websites use none of the monitored systems. Without a CMS, however, every change to content or meta tags requires a developer's work. A CMS therefore makes ongoing SEO work easier, especially with frequent updates.
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