Is WISH a scam?!

You have probably heard a lot about Wish app and web shop where prices are much cheaper than on usual web shops and where you can even get some things for free, just paying for shipping. What is it about? Is it a scam?
I have watched a lot of YouTube videos about it and I must admit most of them were successful!
How can items be so cheap (prices as low as $1) and still be good quality?
Have you ever ordered something on Wish? Is it even safe to provide them all of the bank account details?
I'd love to hear real experiences.