WordPress is open source and a site built with it means you can keep everything, not just the data. There is no chance of getting banned from a service and leaving with nothing. You are free to host it wherever you think best.

WordPress automatically generates title tags and meta descriptions for pages and is search engine friendly by default, which means you can rank better in search engines. Advanced Search Engine Optimisation (SEO) features are available with plugins which take WordPress to the next level.

WordPress has been around since 2003 and have a thriving, large community of developers. It is a very successful open-source project and is completely free to use.

Many years ago WordPress was mainly for building blogs, but this is no longer the case. Today, WordPress can and is used for almost any type of website.

With a large an active community of users, the internet is full of resources to learn about WordPress. 

There are many example of very large companies using WordPress for sites with millions of views a month. WordPress grows with you and has the flexibility to add whatever functionality you might need in the future.