Why have the three dots syntax?

So basically I have a doubt in java developement which i don’t get what’s the difference between these two lines:

[...cars].forEach((car) => console.log(car));

AND

cars.forEach((car) => console.log(car));

The triple dots are called the object spread operator. Basically it allows you to expand variables in useful ways to simplify the code you're writing. Here's a couple articles about it:

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Spread_syntax
https://medium.com/@oprearocks/what-do-the-three-dots-mean-in-javascript-bc5749439c9a