Quality Score is a diagnostic metric that estimates keyword, ad, and landing page relevance in paid search.
It matters because paid search can spend budget quickly. Knowing this term helps teams control intent, targeting, bidding, creative, conversion tracking, and lead quality instead of optimizing for surface-level clicks.
Example
Example: A keyword with below-average ad relevance and landing page experience may have a weak Quality Score. Improving the ad message and landing page alignment can make the campaign more competitive.