What I mean is that you have to understand what you most want to accomplish. If you want to build a growing business, the best way to do that is not to start from a product and then figure out how to attract users, it's to test product / user acquisition channels together.
I have some authority in the space because I've done it the wrong way twice! www.skritter.com is the first company I built way back in 2008 and growing it was really challenging. It's a niche within a niche and most growth tactics simply didn't work. I'm proud that it's become so durable and taught so many people, but from a customer acquisition perspective, it was very challenging.
www.codecombat.com had some organic acquisition channels that worked well, but they proved to be mostly non-repeatable.
I'm now working on my third company (also an AI B2C SaaS play), but I started first and foremost by identifying a viable discovery channel / product pair. In this case, I found that paid advertising in the elder care space converts well.
To put it more bluntly, a product without a customer acquisition channel is closer to a hobby than a business. A product with an acquisition channel that is somewhat scaleable and repeatable is likely to be a profitable business. A product with high growth / viral acquisition channel is a startup.
I'm not knocking operating a hobby product. I've done that and there are good and bad parts to the experience. But if you want to grow, you shouldn't be asking the question "how do I grow this product?" you should instead be asking "what product could I build that has a demonstrable acquisition channel?"