If I’m going to split test a new product page, can I name both page the same? and how should I start driving traffic to the new page? I mean, do I use my best performing campaign and duplicate it 2 times, 1 campaign drive traffic to my original page and 1 campaign drive traffic to my new page?
Yes, Name them differently. For example: page1 and page2.
Yes, duplicate your best performing campaign and drive it to the new page (so just change the link URL in your ads). The alternative is to use VWO to properly test it