An advertisement distribution system can generate advertisement creatives having annotations and advertisement microsites using content extracted from landing web page documents. An advertisement module of the advertisement distribution system can analyze landing pages and other documents to identify relevant information, such as a phone number for a click-to-call annotation, an address for a merchant, and additional product information. The advertisement module can automatically generate the advertisement creatives and/or microsites using the extracted content. The microsite can include less data intensive content than the landing page and be linked to the advertisement creative. In this way, the less data intensive microsite can be downloaded and displayed in response to a user selecting the advertisement creative rather than downloading the landing page. This supports quicker advertisement browsing and is especially useful for serving advertisements on wireless devices having slower download speeds.