Why after installing updates for the Android application, its size grows with each update?

Question

Android

Good day everyone!
Please tell me why over time (from the moment of installation to .....) after each update of the application, its size grows, although the original installation package may be small, and if the application is reinstalled, it will take up some space for some time .
This is especially true for those applications that were previously transferred to the SD card. Their size increases many times after each update installation.
You can compare with the example of Facebook Lite, which during the initial installation weighs about 3-5 MB, and over time it can grow to hundreds of MB

Answer 1

User data, application cache.