What are Jumper Wires? You can read it at Electronics For You

What are Jumper Wires?

What are Jumper Wires used for?

Jumper wires are wires that have a connector pin on each end. This allows them to be used to connect two things together without having to solder. Think of a sensor to a motherboard or one from one component to another component on a breadboard. Or just to connect your Arduino or Raspberry Pi to a breadboard .

Jumper Wires are generally used during prototyping with breadboards or similar prototyping tools. Because you don't have to solder, it is very easy to modify the project.

Jumper wires come in different shapes and sizes, so you can always find a type that fits your project.
There are 3 different combinations possible. You have:

F/F – Female/ Female, These have a connector on both sides that can accommodate a pin.
M/M – Male/ Male, These have a connector with a pin on both sides. You can plug this into a breadboard, for example.
F/M – Female/ Male, This has a connector on one side that can accept a pin and a connector with a pin on the other side.

What do the colors mean?

In principle there is no difference in the jumper wires, the colors have no special meaning.
However, the different colors are useful, you can give them a value yourself, such as Red for the "plus" and Black for the "minus"
This makes it easier to quickly find the right wire for large projects.