Web site requirements describe the features, functions, and content of the site. They are a list of what the site must have and what it must allow users to do.

Requirements might be general features and functions, such as:

• Search
• Contact us
  

Requirements might be specific features and functions for your site. Perhaps your Web site must allow users to:

• Apply for grants online
• Sign up for email alerts of contract opportunities
• Purchase products
• Get data from a database

Requirements might be specific content or content areas that your site must cover, such as:

• Reports of research
• Articles on health for the general public
• Lists of funding opportunities
• Links to other related sites
• Reports of meetings
• Press releases
  

For more info: usability.gov/design/requirements.html