Do keywords in reviews help your SEO?

Short answer

Yes, indirectly. When customers naturally mention services, products, or your city in their reviews — "great brake job in Denver" — that language adds relevant context to your profile and can help you surface for those searches.

How to encourage it (honestly)

• Don't script reviews or tell people what to write — that violates policy.
• Do provide great, specific service so customers naturally describe it.
• Your own review responses can naturally include relevant terms.

Never fabricate keyword-stuffed reviews; Google's filters and customers both see through it. Genuine reviews that happen to describe what you do and where are the goal — and they come from doing memorable work.