I'm slowly getting the pace of being an average laptop

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I'm slowly getting the pace of being an average laptop user instead of being a amateur. I'm getting more into the depth of my shitty computer and such and I can use it at its peak.
I have an intel core i7 integrated card and some nvidia cheap card with it, I can alternate without any problem but I can't seem to understand its use, in fact, the nvidia graphic card is so cheap I don't even use it when playing games, I use intel... You would think that with its reputation, the nvidia card would impress me lol
The only recent utilisation I've found for my nvidia is working with bluestack, somehow the intel card can't seem to emulate that properly so I end up doing it on the nvidia.

So what are the use of such cards ? Does anyone have more info on that ?

https://www.cnet.com/products/dell-latitude-e6430-14-core-i5-3230m-windows-7-pro-64-bit-4-gb-ram-500-gb-hdd-series/specs/