Someone searches on “laptop computers” and clicks an ad. Which landing page would be most relevant?
A computer store homepage
A page showing laptops
A page showing a tablet
A page showing both laptops and desktops
Landing page experience is AdWords’ measure of how well your website gives people who click your ads exactly what they’re looking for–quickly and effortlessly. Your landing page is the URL people arrive at after they click your ad, and the experience you offer affects your Ad Rank and therefore your CPC and position in the ad auction. Your ads may show less often (or not at all) if they point to websites that offer a poor user experience.
Read more here: https://support.google.com/adwords/answer/2404197?hl=en