What is a "pulse"

Hello, I am very new to “WhatPulse” and i was wondering what is a “Pulse”
I really don’t know what it is so if someone could explain to me what it is that would be helpful, Thanks!

From the Help Center:
A “Pulse” is the term used by WhatPulse to define the action of transferring your statistics from the WhatPulse client to the WhatPulse servers. The WhatPulse client, which is running on your computer, has to communicate with the servers to tell them how many statistics (keys, clicks, uptime, network traffic) it has counted.

For more details, check out the knowledgebase article here: http://whatpulse.org/kb/content/2/8/en/what-is-pulsing.html