[Python] what is wandb in Google Colab and why do we use it?

here is the screenshot from google colab I was preparing a YOLOv9 model. And i saw this wandb stuff. But as I remember there were no wand warnings a few months ago. I don't get the difference of using wandb or not.

Can someone explain?

I just waited for the time is up. I didn't choose any of 3 options.

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