As software developers for desktop software, we monitor how visitors arrive at our website, which pages they visit the most, which are the entry and exit pages. We also measure the number our software was downloaded. And then, after the download, there is silence: We do not know if the user installed the software if he/she keeps using it or he/she abandoned it the next day. We do not know how many active users we have.
Application analytics is the new tool that allows you to look into these matters for the first time.