Hi,

I'm new to Google Adwords and I just red about something called "split testing"
From what I understand when there is a difference of 30 or more clicks, I suppose to delete
the ad with the least clicks and keep the ad with the most clicks.

Question:

If I keep the ad with the most clicks and delete the others adds in the same ad group, after a month of so
how am I suppose to keep a record of the winning ad if one of the ads (the previous winning ad) will have more clicks than the other newer ads.

I would appreciate any help
Jezzze