If your growth relies on people happening to mention you, the business is carrying too much risk from a lack of control over its own pipeline.
Because word of mouth is a result of good work, but it is not a system you can actually drive.
The business needs to turn its reputation into repeatable assets and systems that generate trust and movement independently of who happens to be talking about you.
If word of mouth is your only engine, the next step is identifying what needs to become a system first.