Measuring if a digital marketing campaign is actually working mostly comes down to keeping an eye on the right stuff. Things like website visits, clicks, and conversions show if people are noticing and doing what you want. On social media, likes, shares, and comments tell you if your posts are hitting home. For emails, open and click rates show if people care about what you send. Tools like Google Analytics or Facebook Insights make it way easier to track all this. The trick is mixing the numbers with some gut feeling