CS>CS Starter????

[Maxine Wilton]

I AM SEEING  MESSAGES HERE ABOUT USING A STARTER FOR MAKING A JAR OF  CS.
Are you supose to use a starter every time you make a new jar of CS?????
IS the statrter supose to be  a cup of  CS that you have made???
 Explain this and what happens if you dont use  a starter???
 What is the end result???
Thanks.
Maxine