First, think about the biggest group of mostly irrelevant traffic you have. By this I mean a segment of visitors that either cannot or most likely will not convert, either because it is not possible or because your site will not properly speak to the visitor’s intent. For example...
- eCommerce Business that only sells in the US: Anyone outside the US would be a ‘sentinel segment’.
- Irrelevent Products: Like a company that sells snowmobiles. I am guessing latin america would be a ‘sentinel segment’.