It functions as a kind of one-stop shop for website creation, e-commerce, blogging, and content management. And perhaps most importantly, it's free.
You are in charge of your own upgrades, security, and backups, to start. If you select the incorrect checkbox in the settings section, you can leave yourself open to hackers.
Additionally, because WordPress depends so largely on plugins to give you the functionality you want, you will have to deal with frequent changes.
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It can also cause issues for web designers. WordPress' template-based design may feel constricting to website creators with advanced skills.