New Servers for PI

Hi I'm Basically very new to PI System,and currently working on estimation for averange capacity for our PI servers. I had downloded pre-requisite for PI hardware Sizing recomendation, but i had a question, on "Expected point Count" Column. What is that suppose to mean by "Points", is it refer to users concurrent connection? or data connection or what ever that is? Can someone explain? Much appreciate and thanks in advance.  

I had attached the sizing template as well just in case.