Question About KPI's on Proposition Groups/Offer
I'm currently working through the lesson titled "Show me how to display an offer on a website".
While configuring the group, lesson mentions choosing metrics that will be tracked.
My question is "Why, either from a business or technical perspective, would we not want to choose all metrics?"
My assumption is that at scale, this has something to do with system load, or size of retained records, but if that is the case, are there any best practices around how many metrics can be tracked before issues are encountered, and if they are, how are they mitigated?
Thanks in advance.