The basic ingredients How do you know if you’ve made something people actually use? The short answer is: check your retention. Different products measure retention using different metrics– if you can, it’s best to use a metric that implies regular use of your core product. For Facebook this is Weekly Active Use, or Daily Active Use. If some proportion of your users keep coming back to use your product every day/week/month, then you have created something they actually use! Congrats. For...
