Quality Score is a rating from 1 to 10 that Google Ads gives each keyword, based on the expected click-through rate, the relevance of the ad and the quality of the landing page, used to influence ad rank and cost per click.
Quality Score directly affects what you pay. Two businesses bidding the same amount can pay very different prices per click if one has a Quality Score of 8 and the other a 3, because Google discounts the more relevant advertiser.
It rewards doing the work properly. A high Quality Score comes from ads that match the search, landing pages that deliver what the ad promised, and copy people want to click, the same things that make a campaign actually convert.
For a small business, Quality Score is leverage. Improving it is free, and a few points can stretch a fixed budget noticeably further.
Two plumbers bid on emergency plumber. Plumber A sends clicks to a generic homepage; their Quality Score is 4. Plumber B sends clicks to a dedicated emergency-plumbing page that loads fast and matches the search; their Quality Score is 9.
Even with identical bids, Plumber B pays less per click and tends to appear higher, because Google factors the score into both ad rank and price.
Over a month, Plumber B's better-built campaign gets more clicks for the same spend, simply because the landing page and ad copy line up with what the searcher wanted.
In-House builds dedicated, fast landing pages and matched ad copy through the web and advertising agents, so Quality Score works in your favour instead of quietly inflating your costs.