If you've been struggling with an indistinguishable heap of USB cables, then you really need this simple USB cable accessory.
As for the charger, it has a single USB-C port that's rated for 45 watts, and that means that you can charge your phone, ...
Your computer likely has multiple USB ports, and maybe even multiple types of ports on the same machine, but how does that ...
Different classes of USB cable have different recommended maximum lengths, whether for data or for power delivery.