I sent the same link to three Slack channels last Tuesday and realized I had zero way of knowing which one drove the 47 signups I saw that morning. Honestly, it was a bit of a wake-up call - I had been relying on my intuition to gauge the success of my side project, but it was clear I needed a more data-driven approach. Look, I know it sounds obvious, but I was so focused on building the thing that I didn't think about how I was going to measure its success. Why I Was Flying Blind I was using a simple curl command to shorten my links, but that didn't give me any insight into how they were performing. I mean, I could see that people were signing up, but I had no idea which channels were driving the most traffic. I was basically just throwing links out into the void and hoping for the best. I even tried using requests in Python to automate the process, but that just made it easier to send out links without knowing what was happening to them.…