x_rscey6aieax7-0 start" start="1"><li class="c0"><span class="c4">UserBrowser calls Publisher Web App (Web Site) asking for content</span></li><li class="c0"><span class="c4">Content is returned</span></li><li class="c0"><span class="c4">UserBrowser calls Publisher Content Server to assemble the page</span></li><li class="c0"><span class="c4">Content is returned</span></li><li class="c0"><span class="c4">UserBrowser calls the Ad Marketplace &ldquo;give me an ad&rdquo;</span></li><li class="c0"><span class="