Explain why it is important to know what political regime is established in the state. What does such knowledge give?

Let’s imagine the following situation: a citizen of k. publicly expressed his dissatisfaction with the current government in his state. or organized an opposition party. for such expression of thoughts he can be fined or, even worse, sent to jail. and all because there is a totalitarian regime in the state! therefore, it is important to know what kind of regime is in your country in order to be sure what can be done and what is not, what rights and freedoms you have.