The claim that you should have just a few campaign is common. It makes perfect sense. If you sell the same or near identical product/service it’s high probability your optimal clients are the same or near identical so the campaigns will compete.
But what about if the products are different. Say, stylish shirts and sports socks? My findings about running parallel campaigns for different products are inconclusive, but I am swaying towards that many campaigns are not a problem if the products are different enough. I might be missing something, though.
Any ideas?