Flockmetrics provides analytics for user signups. The key to growth is often considered to be getting users and retaining them. Flockmetrics focuses on the former, giving you actionable data on how and why users are signing up to your website, web app or SaaS business.
With a tool that focuses only on user signups you can get better, more clear data that is not hidden away behind segments, dimensions, funnels or other complicated data-scientist-only terminology.
Having that signup data allows you to experiment and measure the results, and helps you to know where to spend your time and energy to get the most new users. Without it, you're probably guessing.