Mingachevir is a place where people live in the country of Azerbaijan. It's kinda like a big town with lots of buildings and houses. But one of the things that's really special about Mingachevir is that it has a really big lake called Mingachevir Reservoir.
This lake was made a long time ago by building a dam across a river. The dam stops the water from flowing downstream and makes it build up behind the dam to make the lake. The lake is really big and has lots of water in it. The people who live in Mingachevir use the water from the lake for lots of things, like drinking, washing, cooking, and growing crops.
The lake is also important because it makes electricity. How does that work, you may ask? Well, the water from the lake flows through big pipes and makes turbines spin. These turbines are like big fans that help to make electricity. The electricity that's made in Mingachevir is used to power things like lights, computers, and TVs.
So, basically, Mingachevir is a town in Azerbaijan that has a huge lake that people use for drinking water and making electricity. Cool, huh?