Hey Egor, that's a FANTASTIC question. Business listings do help improve your ranking on Google. This has been proven. We and other public studies we've seen estimate business listings are responsible for about 25% of your ranking as a local business. However, it's important to remember that there is a whole other 75% of Local SEO out there you also need to think about at some point. We do encourage people to get started with business listings though since they're a one time cost and they're relatively inexpensive compared to the rest of Local SEO (the other 75%). Business listings are by far the biggest "bang for your buck" in Local SEO and we always recommend a local business start with business listings first.

We recommend doing business listings first, giving your Google ranking about 2-3 months, and then based on if you're on the 1st page or not for your keywords, approaching the other 75% of Local SEO at that point.

I hope that helps answer your question. If not, post a follow up and I will reply back!