Accordingly, can I skip Android updates?
You can skip as many updates as you want, barring any special circumstances.
Beside above, are software updates necessary for Android? Although one of the most important aspects of Android updates is Security, there is much more to it than patching security holes. Updating your device ensures you get the best version of the Android Operating System (OS), which means you get the fastest version available.
Also, why does my phone keep saying system update?
If it's apps it is because you ticked auto update in the google play store, such that each time there's a new update for an app installed on your phone it updates automatically without your consent and without opening the google play store.
What is a system update?
Introduction. Android devices can receive and install over-the-air (OTA) updates to the system and application software. Android notifies the device user that a system update is available and the device user can install the update immediately or later.