I have a question I do not know if I should turn gsync on or off and what does it bring that I play mainly fortnite does what if it is on?
G-Sync only brings you something if you have an Nvidia graphics card, which you will probably also have.
But yes, G-Sync synchronizes your monitor with the graphics card, thus preventing ghosting and giving a generally smoother picture.
So is Gsync the same as Vsync?
Yes, but G-Sync is for Nvidia cards and V-Sync is for AMD graphics cards.
For example, AMD graphics cards are installed in the consoles, or the unit.
Therefore, the Ps4 and Xbox One X require Freesync.
Ah wrong.
V-Sync is the worst but first synchronization for the monitor.
Freesync is for Amd
And G-Sync is for Nvidia