Have you ever been looking at your Google Analytics reports and couldn’t remember what caused a traffic spike? The good news is you’re human and the better news is Google has your back with handy little tool they call annotations.
I published an article at ArtsHacker yesterday that walk you through what annotations are and each step in the very short process required to create them.
Seriously, these little buddies are going to save you all kinds of time down the road whenever you need to do long term data analysis and it only take seconds to figure them out.