How to grow a Micro-SaaS? 🚀

I see a lot of people saying that founders should focus more on marketing, but what exactly does that mean?

I created a Micro-SaaS recently called beew.io, a simple HTTP Request Scheduler, and I did got a few users and some traffic (200 unique visitors /day) by posting about it in Reddit, Hacker News and here in IH. But what now? What other channels could I use?

Content marketing for such a small Saas seems a little overkill. Right?