What is the use of the rotary encoder?

What is the use of the rotary encoder? Correct Answer To measure RPM or speed

The rotary encoder is used to measure the RPM or speed or any other such motion and angular velocity related parameters of any robotic system or any other system in general. It provides a series of ticks which provide us with the necessary information to decode that into our required values.

Related Questions

Statement (I): The term ‘encoder’ is used for a device that provides an analog output as a result of angular or linear displacement. Statement (II): An increment encoder detects changes in angular or linear displacement from some datum position where as an absolute encoder gives the actual angular or linear position.
What is the purpose of the CLK pin in the rotary encoder?
What will happen if we supply a voltage of 25V to the Vcc of the rotary encoder?
What is the purpose of the DATA pin in the rotary encoder?
Rotary encoder is an ADC.