Offers a much better way than the History of your browser to capture, organize, save and search through all of the info you navigate through daily.
I need to test it further but it looks as a very interesting tool I'd probably adopt for keeping better track of what I have gone through and re-find more easily content that it is important to me.
It has a few shortcomings in my tests:
Even though I am logged into Google, I cannot login into the app and see my history
I need to open a new browser or clear cache and cookies.
When I click on "Mark Current Page" there's no visual indication of whether my command has been registered or not.