A monarchy is a system of government in which one person reigns, usually a king or queen. The authority, or crown, in a monarchy is generally inherited.
There are many pros of a monarchy but here are some the leaders will be good because they were taught to lead and they can focus more on the country instead of having to work on getting elected.
There are only few cons. They can have excessive power and if you do not like the leader than you can do nothing but deal with them.
King Charles III said, "I devote all my attentions to improving the welfare of my subjects, since I wish to save my soul and go to Heaven."
"For every monarchy overthrown the sky becomes less brilliant, because it loses a star. A republic is ugliness set free." -Anatole France
Some countries under monarchy are Vatican City and Swaziland.