What are the implications for campaign performance when the landing page experience is not optimized for Japanese mobile users despite strong ad copy?

When strong ad copy on Yahoo! Japan directs users to a landing page not optimized for Japanese mobile users, the implications for campaign performance are significantly negative, resulting in lower conversion rates, increased bounce rates, decreased quality scores, and wasted ad spend. Japanese mobile users expect a seamless and user-friendly experience on their smartphones. If the landing page is slow to load, not mobile-responsive (difficult to navigate on a sma....