Explain basic end stop switch sensors and how to enable and load correctly in Marlin Firmware on RAMPS 1.4/Arduino MEGA 2560

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Required hardware:
RAMP 1.4 board
Arduino MEGA 2560
USB Cable
Mechanical End Stop Limit Switch+Cable
TEMCo Micro Limit Switch Roller Arm

Required software:

Arduino IDE (version 1.8.2 or higher)
https://www.arduino.cc/
Marlin Firmware (version 1.1.6)
http://marlinfw.org/
Pronterface Software:
http://www.pronterface.com/