Freedom of expression is one of the oldest human rights. It is guaranteed by the Declaration on the Rights of Man and Citizens, but also by various international human rights documents. The most important of these are the Universal Declaration of Human Rights and the International Covenant on Civil and Political Rights as well as the European Convention for the Protection of Human Rights and Fundamental Freedoms. Freedom of expression is a protective right in relation to the state. This would mean that it is the State that must respect the freedom of expression of all persons on its territory and should not restrict it, except in the foreseen and prescribed cases. The right to freedom of expression is guaranteed so that citizens can express their opinions even when it is critical of the authorities, and without fear of negative consequences. However, the right to freedom of expression is not absolute. Like all fundamental human rights, it can be restricted. The restriction is particularly notable for the right of personal honour. And this means that insult and slander are not protected by freedom of expression. That is, everyone has the right to express their opinions and criticize others, but there is no place for insults and slander here. It is also important to mention as one of the limitations and spread of hate speech. The restrictions must be adhered to by any holder of freedom of expression. Otherwise, sanctions follow. Those who allow to spread opinions, must also ensure compliance with the restrictions. Yet for democracy to exist, citizens need to be able to speak freely and openly about how they would like to be governed. Protecting freedom of expression encourages people to express their opinions.