The use of the Internet is inextricably linked to the provision of information about us. We share some of them consciously, even if they are included in the registration forms, and others unintentionally. Just installing an application on a smartphone or tablet starts the flow of data, such as our location, pages visited, our interests.

All free applications must either display some advertisements to us or collect personal data from us, which will then be used to display advertisements. The application is not free of charge and if we do not pay directly for the application, we have to pay for access to it indirectly.

As far as public awareness is concerned, there is still a great deal to be done in this area. Most of us have learned to live in the real world, and cyber-reality has completely surprised us. However, this does not relieve us from the preventive protection of our privacy. - We promise ourselves a great deal after the general regulation on the protection of personal data adopted by the European Union, which will come into force in less than two years' time.

It introduces the principles of 'privacy by design' and 'privacy by default', which indicate that privacy settings in devices, products or services are to be geared towards maximum user protection. Thanks to this, it will not have to wade through the maze of complicated settings in order to be able to optimally protect and control information about itself. It will be up to him to decide whether and which data he wants to make available.