Crimping is a style of joining wires to metal fittings that are then used to connect the wire to another wiring component or to other wires.
The fittings themselves come in various styles, and are collectively known as “crimp connectors.”
They are most commonly used with stranded wires found in the wiring of appliances, electronics, or automobile systems.
The technique involves compressing a small insulated metal sleeve on the end of the connector around the exposed bare wires.
Wire connections using crimp connectors are often used in locations where the heat of soldering is not appropriate, or where the wire connection may need to be detached occasionally.
Connections made with crimp connectors take up little space; they also are easier to make than solder connections and when done properly, they can be just as effective.
When you crimp a connector onto the end of a wire, the idea is to form a tight, continuous electrical union between the wire and the connector fitting that will stay together permanently.
To achieve this, both the connector sleeve and the wire both have to be malleable enough to deform under a compressive force.