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Hey Crystal, a couple things come to mind in this scenario. The first is the obvious stuff like duplicate GA tags, which in my experience cause 100% bounce rates, not 0%, but still could be a possible issue. The second is that something on the page is firing that causes a "single-visit but non-bounce session". The article linked earlier by Linda is a good explanation of this, but essentially there are multiple interactions a user can have on their first page of the site that would count as a non-bounce visit. They are: Pageviews (sent via _trackPageview) Events (sent via _trackEvent) Ecommerce Items (sent via _addItem) Ecommerce Transactions (sent via _trackTrans) Social (sent via _trackSocial) User Defined _deprecated, though functional _(sent via _setVar) (Cited from http://www.analytics-ninja.com/blog/2012/06/google-analytics-bounce-rate-demystified.html) So, if the developers installed a tag that fired an event when PPC visitors land on the site, for example, that would cause a 0% bounce rate from PPC visitors, even if that user left without viewing another page. Not sure if that's your problem for certain, but it was the first issue that popped into my head. I haven't heard of a remarketing script firing one of these hits but could be the reason.

That is definitely true about there being no one formula for marketing that leads to success. I think my question is directed at how all the pieces of marketing and advertising for medium sized business should work together.  Once all the pieces have been identified, and the big picture is more clear, then it would be easier for someone to focus on certain areas at a time for more detailed education.