A referral is the best client you can get. It also arrives only as fast as your current clients talk, so your growth follows their schedule instead of yours.
Picture a business owner in your city who needs a new accountant and has nobody to ask. She searches, opens three firm websites, and calls the one that looks current and trusted. The other two never find out they lost her.
That quiet loss repeats every week. It explains the slow quarter that felt like bad luck, and the plateau that stays put no matter how hard you work.