How to Create Simple Extensions in Magento 2

Before creating the extension, it is very important to know what the difference is between Magento 1 and Magento 2, because we have to create the modules right inside the app/code directory. In Magento 2 there was a momentous change in the structure of the code, the directory is structured in such a way that code pools are removed from the code-base file structure.

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