hw does one exercise the latissimus dorsi

Hello. Latissimus dorsi or Lats are the biggest muscles on your back. There are phew exercises which target these muscles specifically. 

You could basically start doing some pull ups, chin ups but the most popular exercise for these muscles is Lat Pull Down.

I could give your more details about this exercise but you got to tell me  are you planning on doing these exercises at home or at a gym? Why do want to exercise these muscles?