What is a web server?

A web server is a software or hardware solution that is installed on a computer or a dedicated device and whose job is to deliver web pages on request to the people who access them over the internet.

The web server accepts HTTP requests (HyperText Transfer Protocol) from web clients, typically web browsers, and sends HTTP responses back, often in the form of web pages in HTML (HyperText Markup Language). Beyond that, a web server also delivers other file types such as images, stylesheets and scripts that the page needs for its layout and its functions.

A web server is therefore a central part of the World Wide Web and is what makes web content available and accessible in the first place.

What is the Apache web server?

The Apache web server is one of the best known and most widely used web server solutions. It is an open-source project maintained by the Apache Software Foundation. The Apache web server is known for its reliability, scalability and extensibility.

It supports a wide range of operating systems, including Unix, Linux and Windows, and offers a broad selection of modules and extensions that let administrators adapt and extend what the server does. The Apache web server also supports a large number of programming languages and databases, which makes it a flexible answer to many different web hosting requirements.

On top of that, Apache has a strong community of developers and administrators who provide support and keep the software moving forward.

What alternatives are there to Apache?

1. Nginx: a very popular web server, known for its performance and its ability to handle a large number of simultaneous connections.
2. Microsoft Internet Information Services (IIS): a web server for Windows server systems that fits neatly into the Microsoft technology stack.
3. LiteSpeed: a commercial web server known for its speed and its light footprint.
4. OpenLiteSpeed: the open-source version of LiteSpeed, also known for its speed and its simple configuration.
5. Caddy: a relatively new web server that stands out for its simple configuration and automation.
6. Tomcat: a web server from Apache designed specifically to run Java code.
7. Node.js (with Express.js or other frameworks): although Node.js is really a runtime environment for JavaScript, it is often combined with frameworks such as Express.js and used as a web server.
8. Jetty: a web server and servlet container that can also run Java-based web applications.

How does the choice of web server affect SEO?

The choice of web server touches several aspects of search engine optimization (SEO). Among the factors it influences are the speed of the website, its security, its availability and how far the server configuration can be adapted. Short loading times are decisive for a positive user experience and for a good position in search, which is why PageSpeed starts at the server.

With its modules and extensions, Apache offers ways to optimize the performance of a website. Security factors such as implementing HTTPS are important SEO elements too, and Apache provides robust security functions. The high adaptability of the Apache web server also lets administrators build SEO-friendly URL structures and tune the server configuration to improve how visible the website is in search engines.

Choosing a reliable and configurable web server such as Apache can therefore have a positive effect on the SEO performance of a website. Whether your server is currently helping or hurting is one of the questions an SEO audit answers with measurements instead of assumptions.