is built into the motherboard and cannot be upgraded or replaced. You'll find this in laptops and inexpensive desktop PCs. These graphics typically have modest performance and don't perform well for tasks like games or professional graphics production.
A discrete GPU :-
is mounted on a graphics card that slips into a computer's expansion slot on the motherboard. This kind of graphics card is replaceable so it can be upgraded as newer graphics cards are developed and helps keep a PC from becoming obsolete