Ok kiddo, so economic citizenship is when a country lets people from other countries become citizens if they invest a lot of money in that country. It's kind of like you giving your friend a really big present, and then your friend letting you be part of their club.
When someone becomes an economic citizen, they usually have to invest a lot of money in the country. This could mean buying property, starting a business, or investing in other things that will help the country's economy grow.
But it's not always easy to become an economic citizen. Some countries have really strict rules on who can become one, and how much money they have to invest. Some countries also have special programs that make it easier for rich people to become economic citizens, but these programs can be controversial.
So, economic citizenship is basically when someone becomes a citizen of a country by investing a lot of money in it. It's like a big present that lets you be part of a new club, but it's not always easy to get.