WordPress is for you who need a simple platform where you can handle most things yourself. Simple platform, understood in the sense that it is cut to the bone, so you can handle a lot yourself without having the great coding skills.
WordPress has for many years been popular with many who have created their own website - often with a blog. Today, WordPress can really do much more than be a blog, and many large companies have WordPress as a CMS (Content Management System).
WordPress provides a super flexibility where you can easily add elements and subpages. You can get various integrations. You can also easily change the design with different WordPress themes.
Something that makes WordPress easily accessible is that it is open-source. This means that the program coding is free, so you (or your developers / agency) can easily change and adapt the program to your specific needs.
You need to choose WordPress because you need a CMS with high simplicity and flexibility combined with easy accessibility and a low cost.