1/4 in TS Female

TS cables are typically used for mono, unbalanced signals. ¼ in TS cables are often called guitar or instrument cables.  They are normally used to connect a guitar to an amplifier. A TS cable/connector is separated by a (T)ip and a (S)leeve; thus TS.

You could use a TS cable when connecting a guitar to an amplifier, audio interface, guitar pedals, or a mixer.  You might also use a TS cable to connect a keyboard with unbalanced outputs to an unbalanced input on a mixer or a DI box.