These Magnetic USB cable often appear in videos on Facebook and I decided to buy to test. Works, but no big deal.
The idea is to have a part that stands out from the main connector and has a magnet.
The connector can be placed on any device.
And how is shown below. The party is in the tablet draws the connector because of the magnet.
See the video I made showing the operation:
But it does not work very well. Sometimes not charge or connect to PC. You have to remove and put back. For the price, it's interesting, but not fantastic.