Counts user's pageviews in a cookie for use in ad targeting.
####Example use for Google DFP
googletag
.defineSlot('/XXXXXXX/SidebarHome', [320, 480], 'div-gpt-ad-XXXXXXXXXXXXX-X')
.addService(googletag.pubads())
.setTargeting("pageviews", wds_viewcount());
In this example, pageviews needs to be a defined custom targeting key setup in DFP.