I'm pretty sure a lot of you have dealt with this issue in the past. Someone puts a link on a specific page and after a while they ask you how many clicks it got. But in the main menu and footer are links to the same page also... Google Analytics can only report on how many people went from page A to B, but not which specific link they used.
Take a look at this blogpost:
A quick post about a new feature Google released quietly: it's possible to raise your site speed sample rate from 10% to 100% if you want. Especially small sites can take advantage of this. How often have you seen this:
A very low sample of pageviews where a page load time calculation is done. This leads to a very bumpy graph in actual page load times. And that is very annoying if you want to analyze your "bring my page load time down" efforts, You can only significantly say something about it if you have at least a week of data. And we all want to see results right away