The first part is volume. A single negative review carries enormous weight when there are four in total and almost none when there are forty. The strongest protection against a bad review is a steady flow of ordinary ones, which means asking consistently rather than reacting after something goes wrong. A business with twenty reviews and an average above four and a half has effectively insulated itself.
Responding matters more than most owners expect, and the audience is not the reviewer. It is the next twenty people reading. A calm, specific, non defensive reply to a complaint frequently does more good than the complaint did harm, because it demonstrates how you behave when something goes wrong, which is what a prospective customer is actually trying to learn. An argumentative reply does the reverse and cannot be undone.
The response pattern that works is short: acknowledge the specific issue, say what you did or will do, and offer to continue offline. Do not relitigate the facts in public even when you are right, because a reader cannot verify who is correct and will judge the tone instead.
What you should not do is attempt to have honest negative reviews removed, buy positive ones, or pay a service promising to bury results. Fake reviews now carry federal penalties, platforms detect and remove them at scale, and suppression services generally produce thin content that does nothing. The durable version of this is doing good work and asking people to say so.
Search your own business name every few months and look at what a customer sees, including the results below the listings. Old profiles on directories you forgot about, a review site entry you have never claimed, an outdated address on an aggregator. None of those are reputation crises and collectively they shape the impression somebody forms. Claiming or correcting them takes an afternoon and is the unglamorous version of what the industry sells as a service.
Respond within a day or two rather than immediately, particularly to anything negative. A reply written while you are still irritated reads that way to everybody who sees it afterward, and the response is permanent while the annoyance is not. Drafting it, leaving it, and rereading before posting is the single habit that prevents the responses businesses regret.