C4 model

C4 Model is like building Lego blocks to make a beautiful house. Builders use it to plan and communicate how a computer system will look like, and how it will work.

To start, we must think of different layers or blocks, just like Lego blocks. For instance, the first layer will be the user interface where people will interact with the computer. The next layer could be the application itself, meaning the program that will do all the work. A third layer could be the database or the place where all the information is stored. And there could be several other layers as well.

Now, when building with Lego blocks, builders start with a basic structure, and then they make it more complex as they add more blocks. They build each section one by one, and they make sure each section fits well with the others.

Similarly, in the C4 model, the different layers or blocks have a specific purpose, and we plan to build each section one by one. We can visualize the entire system in a diagram. The diagram shows different blocks or sections, and we can see how they are connected to each other.

Using this diagram, it becomes easier for developers to understand how the system is supposed to work. They know which blocks they have to build first, and which block comes next. This helps developers to work efficiently and make sure the entire system is working well in the end.

So, in simple words, the C4 model helps the builders to see how the system is organized and how the blocks are connected. The builders follow this plan carefully to make sure everything works perfectly in the end.