CMS stands for content management system. It is software that allows you to easily create and maintain a website. Both the creators and the people who use it keep it updated and extended. The most popular CMS in the world is WordPress. Its main advantage is its popularity and the fact that operation from the site administrator level on this type of system always looks the same. It is also worth mentioning that some companies create their own CMS on which their clients' websites are based. Unfortunately, this has its drawbacks. Because in the event that such a client would like to change the company that serves them, few companies would want to take over this type of client. Because, one does not usually have access to the documentation of someone else's content management system. Therefore, making changes and adding new options is significantly hampered.