Say you're selling an e-book with PPC marketing, and it's selling ok, but you want to test out the conversion rates/epc on a very similar e-book from a different merchant.
Would you just switch out the link for your ads, or start a new campaign alongside the current one to test the new book?
The reason I would be hesitant to start a new campaign is that I feel like I might flood my market with ads for competing products and cause people to buy neither.
If u use cpvlab it's a matter of switching in n out the links then analyze the stats from your tracker.. Pretty no brainer dude. Go get it.