They all represent types of democracy.
Ancient Greek democracy (where it existed) worked as follows. A pubescent boy would stand naked in the middle of the assembly. If the other men could see evidence of puberty, then the boy was deemed to be a man and admitted to the assembly. Needless to say, such Greek democracy was limited to adult males who were not slaves or foreigners.
Donald Trump is an excellent example of liberal or bourgeois democracy. This type arose in Europe after the French revolution and it typically has a limited number of political parties that are much like one another. Occasional elections are held, while most of the actual governing is done by a parliament, which spends its time pandering to the rich and powerful. It is a system that can produce someone like Donald Trump, who embodies the truth of such a system.
Vladimir Putin represents illiberal democracy. It has many of the trappings of liberal democracy, with some political parties, elections and parliaments. But the system is geared to ensure one party stays in power.