Hey guys,
Bit of a broad question and will probably vary for vertical to vertical and traffic source to traffic source, but could someone give me a ball park figure of what a good CTR, CR & CV to aim for would be? (Also i know what CR and CV are but what do they stand for again, Conversion rate &....?)
Is there ever a point with some campaigns where these values are good enough and you stop split testing, or do you just keep split testing until the end of time?
Im sure there'll be different answers and im keen to hear them all 
Cheers!
short answer:

A time where you stop split testing? Why? You must always strive to optimize your campaigns (and not only your campaigns).
CTR stands for Click Through Rate.