Companies that want to participate in mobile commerce should first review their Web sites to determine how well the site works when viewed on a mobile device. Many companies that are serious about connecting with mobile users are creating separate Web sites for mobile users. For example, the Scottrade Mobile Web site is optimized for display on the small screens used in smart phones. The site gives Scottrade customers quick access to financial markets information and to their trading accounts. Yahoo! Mobile provides a version of its Web portal that is similarly optimized for the small screen and limited controls of most smart phones.