Recently, Google announced that landing page load time will become a factor in determining quality score for Adwords. Today, they have launched a landing page load time metric for Adwords users.
The metric can be found on the Keyword Analysis page.
The load time factor will begin affecting Quality Score in mid-June. Need help improving your landing page load time? Google helps you out with, "How does load time affect my landing page quality?"
Optimising Digital Marketing Campaigns with Search, Social and Analytics
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