1) The document discusses how Walgreens' website is able to obtain customer data and information, provide information to customers, and evaluate its performance.
2) Specifically, the website can collect data on which sites customers visited before Walgreens, gather customer information, and inform customers about services through features like Express Refill.
3) Walgreens evaluates its performance using metrics like daily traffic rank, percentage of internet users visiting the site, popular search phrases, and search engine marketing opportunities.