[gerner]

I guess I was more interested in channels that aren't visible to google analytics (i.e. anything other than PPC?)

how about banner impressions that don't result in a click and aren't run by Google? What about views on guest posts or partner sites?

If your entire marketing strategy is SEO with clickthrough + PPC + on-site content, then, yeah, seems like GA should solve the problem. But if not? Sample size of me: lots of people do marketing activities outside the Google ecosystem.

[tixocloud]

For that type of analysis, I believe you'd need a platform that ties all these data sources together.

We just use Excel and Tableau to get it all into 1 view. Don't really have the budget for other tools.