It would be awesome to have functionality for landing pages to personalize and tailor both copy and headers to "match keyword parameters, pay-per-click (PPC) campaigns, and other sources, using external variables you can attach to the URL." See examples below: http://documentation.unbounce.com/hc/en-us/articles/203661004-Using-Dynamic-Text-Replacement https://landerapp.com/blog/dynamic-text-replacement
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