How to rescale a texture?

Hello, i’m a beginner and i’m following the programming tutorial on youtube.
I’m currently blocked here : - YouTube
When i do it, my texture is too big and too scaled and i don’t find how fix it.

Thank you for helping

Open your material and add TextureCoordinate node, plug it into your UV texture input and then you can change scaling (tiling) of texture via UTiling and VTiling options:

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