Social networks, video games and applications make it the perfect place to have fun, learn new things and always stay in touch with friends, even the farthest! But this planet is unsafe: in addition to ordinary people, it is inhabited by trolls, haters, impostors and stalkers. In short, cyberbullies. They are the "dark side" of the planet Internet. Hiding behind the screen, they attack with deadly weapons, simple and lightning fast, like one click. To repel their attacks, you need special training, or even better - a tutorial that will teach you how to identify a cyberbullier, defeat him and put him on the carpet. The allowance must be small to fit in a pocket or backpack, brief and full of little tricks.