So (in the free version) there is no domain of your own. The address is in the form meinblog.wordpress.com. It doesn't look particularly professional and you also have no way of receiving emails on your domain and usually have to resort to a freemailer like web.de, gmx.de or gmail.com. I don't know about you, but I always have the feeling that I'm not writing to a "real" company when I have to write to (address fictitious!).
You have a maximum of 1 GB of storage space available. That seems like a lot at first, but depending on what you want to do with your blog, it can quickly become tight.
In the free version, you cannot cayman islands telegram screening upload MP3 files (keyword podcast) or video files (whether that makes any sense at all is debatable, but it is simply not possible). You only have a limited selection of themes (these are the design templates for design), which you can only customize to a limited extent (if you want more, you will have to dig into your pockets).
In addition, there are advertisements that you can only control to a limited extent and you do not benefit from the revenue yourself (if it is your idea to monetize your blog in this way).
You cannot install any plugins that make professional online marketing possible. This means that the options of integrating your own newsletter, making search engine optimization easier, designing landing pages, setting up protected member areas, using Google Analytics - all of this and much more is either denied to you or is only possible for a fee. The money you have to spend on this is about the same as t