title: Prevent overlapping between 2 Experiments in Google Optimize?
body: <p>Could you please help me with a rule that can exclude users that have already been exposed to one of other experiments in Google Optimize?</p>
  
  <p>What is the best approach?</p>
  
  <p>I am thinking about using 1st party cookie variable or some other custom variable that would mark the user as "exposed" so that another experiment will not affect him.</p>
  
  <p>In addition I can use "run custom "JavaScript" in Optimize's visual editor that will create such a cookie. Will that solve the problem?</p>
  
  <p>Also I can't understand how to prevent 2 experiments from running simultaneously. So that user who sees experiment A will not see experiment B or C (free version is limited to 3 experiments). Is there any rules or configuration that can help with that?</p>