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> Vals are small JavaScript or TypeScript snippets of code, written in the browser and run in our servers.

Took two seconds by going to the home page.

While you describe the technical approach, I think OP was asking "what is it? What does it do? Why would I care?"

I can't really figure out the "Why would I care?" part from their website. I've been hearing them pop up a bunch. Just don't understand what they do.