The Google ad quality score is graded on a 1-10 scale that includes three factors. The three factors are ad relevancy, landing page relevance and expected click-through rate. These scores matter a great deal when determining the outcome. If you optimize these three correctly you should almost always return a score that is higher than average. The article makes it seem fairly easy to achieve this. All it takes is a small bit of attention and you should accomplish this.
makes it more relevant and useful to navigate and read
makes it possible to be eligible to enter an auction
if you have a higher quality score than your competitor, you can pay less for a higher ad position.
“Google Ads considers how well your keyword has performed in the past based on your ad’s position.”