WordPress was primarily used to create blogs many years ago, rather than more traditional websites. That has not been the case for a long time. Nowadays, thanks to updates to the core code, as well as WordPress' extensive ecosystem of plugins and themes, any type of website can be created using WordPress.
WordPress, for instance, not only powers a large number of business sites and blogs, but it is also the most popular platform for developing ecommerce stores as well. WordPress allows you to create:
Business websites
ecommerce stores
Blogs
Portfolios
Message boards
Social networks
Membership sites
and much more!