Abstract: Techniques for dynamic landing pages are disclosed. In some embodiments, a process for providing dynamic landing pages includes selecting a dynamic landing page in response to a request for a Uniform Resource Indicator (URI) (e.g., destination URI) of a web site using a dynamic selector engine; and returning the dynamic landing page using a proxy service. For example, the dynamic landing page can correspond to a web page that is returned in response to the request for the destination URI, and the web page can include customized content (e.g., including a widget) that is targeted for a campaign, channel, source, and/or user.